electronics/lw35-upgrade
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electronics:all-spi
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compare: electronics:b4bc651445a4807002e9f237708f56d14904c1c9
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electronics:all-spi

2 Commits
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Author SHA1 Message Date
Markus Koch
b4bc651445 ioc: bootloader: Disable LED, add X and Z commands, clean up 2019-11-10 19:48:24 +01:00
Markus Koch
1be8f62f3e ioc: avr: Set IOC baudrates to 19200 2019-11-10 19:44:24 +01:00
5 changed files with 234 additions and 299 deletions
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3
.gitignore vendored
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@ -1,6 +1,3 @@
# Directories
doc
# AVR temp files # AVR temp files
*.srec *.srec
*.s *.s

11
doc/ioc.md Normal file
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@ -0,0 +1,11 @@
# IOC
## Firmware
### General
* All serial links run at 19200 baud
### Bootloader
* The bootloader is a standard Arduino bootloader with the following additions
* Use ASCII command 'X' to enable loop-through mode. Everything received on UART RX will be forwarded to UART TX until the next reset.
* Use ASCII command 'Z' to immediately launch into the user firmware
* Use the following avrdude command to program: `avrdude -p m8 -P /dev/ttyUSBx -c arduino -b 19200 -U flash:w:$(TARGET).hex`

467
ioc/avr-bootloader/main.c
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@ -7,6 +7,7 @@
/* */ /* */
/* Hacked by DojoCorp - ZGZ - MMX - IVR */ /* Hacked by DojoCorp - ZGZ - MMX - IVR */
/* Hacked by David A. Mellis */ /* Hacked by David A. Mellis */
/* Hacked by Markus Koch */
/* */ /* */
/* This program is free software; you can redistribute it */ /* This program is free software; you can redistribute it */
/* and/or modify it under the terms of the GNU General */ /* and/or modify it under the terms of the GNU General */
@ -38,19 +39,7 @@
#include <avr/interrupt.h> #include <avr/interrupt.h>
#include <util/delay.h> #include <util/delay.h>
//#define F_CPU 16000000
/* We, Malmoitians, like slow interaction
* therefore the slow baud rate ;-)
*/
//#define BAUD_RATE 9600
/* 6.000.000 is more or less 8 seconds at the
* speed configured here
*/
//#define MAX_TIME_COUNT 6000000
#define MAX_TIME_COUNT (F_CPU>>1) #define MAX_TIME_COUNT (F_CPU>>1)
///#define MAX_TIME_COUNT_MORATORY 1600000
/* SW_MAJOR and MINOR needs to be updated from time to time to avoid warning message from AVR Studio */ /* SW_MAJOR and MINOR needs to be updated from time to time to avoid warning message from AVR Studio */
#define HW_VER 0x02 #define HW_VER 0x02
@ -61,18 +50,18 @@
// avr-gcc compiler v3.1.x and older doesn't support outb() and inb() // avr-gcc compiler v3.1.x and older doesn't support outb() and inb()
// if necessary, convert outb and inb to outp and inp // if necessary, convert outb and inb to outp and inp
#ifndef outb #ifndef outb
#define outb(sfr,val) (_SFR_BYTE(sfr) = (val)) #define outb(sfr,val) (_SFR_BYTE(sfr) = (val))
#endif #endif
#ifndef inb #ifndef inb
#define inb(sfr) _SFR_BYTE(sfr) #define inb(sfr) _SFR_BYTE(sfr)
#endif #endif
/* defines for future compatibility */ /* defines for future compatibility */
#ifndef cbi #ifndef cbi
#define cbi(sfr, bit) (_SFR_BYTE(sfr) &= ~_BV(bit)) #define cbi(sfr, bit) (_SFR_BYTE(sfr) &= ~_BV(bit))
#endif #endif
#ifndef sbi #ifndef sbi
#define sbi(sfr, bit) (_SFR_BYTE(sfr) |= _BV(bit)) #define sbi(sfr, bit) (_SFR_BYTE(sfr) |= _BV(bit))
#endif #endif
/* Adjust to suit whatever pin your hardware uses to enter the bootloader */ /* Adjust to suit whatever pin your hardware uses to enter the bootloader */
@ -80,12 +69,6 @@
#define eeprom_rw(addr) eeprom_read_word ((uint16_t *)(addr)) #define eeprom_rw(addr) eeprom_read_word ((uint16_t *)(addr))
#define eeprom_wb(addr, val) eeprom_write_byte ((uint8_t *)(addr), (uint8_t)(val)) #define eeprom_wb(addr, val) eeprom_write_byte ((uint8_t *)(addr), (uint8_t)(val))
/* Onboard LED is connected to pin PB5 */
#define LED_DDR DDRB
#define LED_PORT PORTB
#define LED_PIN PINB
#define LED PINB5
#define SIG1 0x1E // Yep, Atmel is the only manufacturer of AVR micros. Single source :( #define SIG1 0x1E // Yep, Atmel is the only manufacturer of AVR micros. Single source :(
#define SIG2 0x93 #define SIG2 0x93
@ -100,18 +83,18 @@ void byte_response(uint8_t);
void nothing_response(void); void nothing_response(void);
union address_union { union address_union {
uint16_t word; uint16_t word;
uint8_t byte[2]; uint8_t byte[2];
} address; } address;
union length_union { union length_union {
uint16_t word; uint16_t word;
uint8_t byte[2]; uint8_t byte[2];
} length; } length;
struct flags_struct { struct flags_struct {
unsigned eeprom : 1; unsigned eeprom : 1;
unsigned rampz : 1; unsigned rampz : 1;
} flags; } flags;
uint8_t buff[256]; uint8_t buff[256];
@ -127,81 +110,50 @@ void (*app_start)(void) = 0x0000;
int main(void) int main(void)
{ {
uint8_t ch,ch2; uint8_t ch,ch2;
uint16_t w; uint16_t w;
//cbi(BL_DDR,BL); /* Disable interrupts */
//sbi(BL_PORT,BL); cli();
asm volatile("nop\n\t"); /* Pre-init I/O */
DDRB = 0;
DDRC = 0;
DDRD = 0;
PORTB = 0;
PORTC = 0;
PORTD = 0;
/* check if flash is programmed already, if not start bootloader anyway */ asm volatile("nop\n\t");
//if(pgm_read_byte_near(0x0000) != 0xFF) {
/* check if bootloader pin is set low */ /* initialize UART(s) depending on CPU defined */
//if(bit_is_set(BL_PIN,BL)) app_start(); /* m8 */
//} UBRRH = (((F_CPU/BAUD_RATE)/16)-1)>>8; // set baud rate
UBRRL = (((F_CPU/BAUD_RATE)/16)-1);
UCSRB = (1<<RXEN)|(1<<TXEN); // enable Rx & Tx
UCSRC = (1<<URSEL)|(1<<UCSZ1)|(1<<UCSZ0); // config USART; 8N1
/* initialize UART(s) depending on CPU defined */
/* m8 */
UBRRH = (((F_CPU/BAUD_RATE)/16)-1)>>8; // set baud rate
UBRRL = (((F_CPU/BAUD_RATE)/16)-1);
UCSRB = (1<<RXEN)|(1<<TXEN); // enable Rx & Tx
UCSRC = (1<<URSEL)|(1<<UCSZ1)|(1<<UCSZ0); // config USART; 8N1
//UBRRL = (uint8_t)(F_CPU/(BAUD_RATE*16L)-1);
//UBRRH = (F_CPU/(BAUD_RATE*16L)-1) >> 8;
//UCSRA = 0x00;
//UCSRC = 0x86;
//UCSRB = _BV(TXEN)|_BV(RXEN);
/* this was giving uisp problems, so I removed it; without it, the boot
works on with uisp and avrdude on the mac (at least). */
//putch('\0');
//uint32_t l;
//uint32_t time_count;
//time_count=0;
/* set LED pin as output */
sbi(LED_DDR,LED);
for (i = 0; i < 16; i++) { for (i = 0; i < 16; i++) {
outb(LED_PORT, inb(LED_PORT) ^ _BV(LED));
_delay_loop_2(0); _delay_loop_2(0);
} }
//for (l=0; l<40000000; l++) /* forever */
//outb(LED_PORT, inb(LED_PORT) ^= _BV(LED)); for (;;) {
//if ((inb(UCSRA) & _BV(RXC))){
/* flash onboard LED three times to signal entering of bootloader */ /* get character from UART */
//for(i=0; i<3; ++i) {
//for(l=0; l<40000000; ++l);
//sbi(LED_PORT,LED);
//for(l=0; l<40000000; ++l);
//cbi(LED_PORT,LED);
//}
/* see comment at previous call to putch() */
//putch('\0'); // this line is needed for the synchronization of the programmer
/* forever */
for (;;) {
//if((inb(UCSRA) & _BV(RXC))){
/* get character from UART */
ch = getch(); ch = getch();
/* A bunch of if...else if... gives smaller code than switch...case ! */ /* A bunch of if...else if... gives smaller code than switch...case ! */
/* Hello is anyone home ? */ /* Hello is anyone home ? */
if(ch=='0') { if (ch == '0') {
nothing_response(); nothing_response();
} }
/* Request programmer ID */ /* Request programmer ID */
/* Not using PROGMEM string due to boot block in m128 being beyond 64kB boundry */ /* Not using PROGMEM string due to boot block in m128 being beyond 64kB boundry */
/* Would need to selectively manipulate RAMPZ, and it's only 9 characters anyway so who cares. */ /* Would need to selectively manipulate RAMPZ, and it's only 9 characters anyway so who cares. */
else if(ch=='1') { else if (ch == '1') {
if (getch() == ' ') { if (getch() == ' ') {
putch(0x14); putch(0x14);
putch('A'); putch('A');
@ -212,190 +164,179 @@ int main(void)
putch('S'); putch('S');
putch('P'); putch('P');
putch(0x10); putch(0x10);
} }
} }
/* AVR ISP/STK500 board commands DON'T CARE so default nothing_response */ /* AVR ISP/STK500 board commands DON'T CARE so default nothing_response */
else if(ch=='@') { else if (ch == '@') {
ch2 = getch(); ch2 = getch();
if (ch2>0x85) getch(); if (ch2>0x85) getch();
nothing_response(); nothing_response();
} }
/* AVR ISP/STK500 board requests */ /* AVR ISP/STK500 board requests */
else if(ch=='A') { else if (ch == 'A') {
ch2 = getch(); ch2 = getch();
if(ch2==0x80) byte_response(HW_VER); // Hardware version if (ch2==0x80) byte_response(HW_VER); // Hardware version
else if(ch2==0x81) byte_response(SW_MAJOR); // Software major version else if (ch2==0x81) byte_response(SW_MAJOR); // Software major version
else if(ch2==0x82) byte_response(SW_MINOR); // Software minor version else if (ch2==0x82) byte_response(SW_MINOR); // Software minor version
//else if(ch2==0x98) byte_response(0x03); // Unknown but seems to be required by avr studio 3.56 //else if (ch2==0x98) byte_response(0x03); // Unknown but seems to be required by avr studio 3.56
else byte_response(0x00); // Covers various unnecessary responses we don't care about else byte_response(0x00); // Covers various unnecessary responses we don't care about
} }
/* Device Parameters DON'T CARE, DEVICE IS FIXED */ /* Device Parameters DON'T CARE, DEVICE IS FIXED */
else if(ch=='B') { else if (ch == 'B') {
getNch(20); getNch(20);
nothing_response(); nothing_response();
} }
/* Parallel programming stuff DON'T CARE */ /* Parallel programming stuff DON'T CARE */
else if(ch=='E') { else if (ch == 'E') {
getNch(5); getNch(5);
nothing_response(); nothing_response();
} }
/* Enter programming mode */ /* Enter programming mode */
else if(ch=='P') { else if (ch == 'P') {
nothing_response(); nothing_response();
// FIXME: modified only here by DojoCorp, Mumbai, India, 20050626 // FIXME: modified only here by DojoCorp, Mumbai, India, 20050626
//time_count=0; // exted the delay once entered prog.mode //time_count=0; // exted the delay once entered prog.mode
} }
/* Leave programming mode */ /* Leave programming mode */
else if(ch=='Q') { else if (ch == 'Q') {
nothing_response(); nothing_response();
//time_count=MAX_TIME_COUNT_MORATORY; // once the programming is done, //time_count=MAX_TIME_COUNT_MORATORY; // once the programming is done,
// we should start the application // we should start the application
// but uisp has problems with this, // but uisp has problems with this,
// therefore we just change the times // therefore we just change the times
// and give the programmer 1 sec to react // and give the programmer 1 sec to react
}
/* Loop UART until reset */
else if (ch == 'X') {
while (1) {
if (UCSRA & (1 << RXC)) {
UDR = UDR;
}
}
}
/* Start user code NOW */
else if (ch == 'Z') {
app_start();
} }
/* Erase device, don't care as we will erase one page at a time anyway. */ /* Erase device, don't care as we will erase one page at a time anyway. */
else if(ch=='R') { else if (ch == 'R') {
nothing_response(); nothing_response();
} }
/* Set address, little endian. EEPROM in bytes, FLASH in words */ /* Set address, little endian. EEPROM in bytes, FLASH in words */
/* Perhaps extra address bytes may be added in future to support > 128kB FLASH. */ /* Perhaps extra address bytes may be added in future to support > 128kB FLASH. */
/* This might explain why little endian was used here, big endian used everywhere else. */ /* This might explain why little endian was used here, big endian used everywhere else. */
else if(ch=='U') { else if (ch == 'U') {
address.byte[0] = getch(); address.byte[0] = getch();
address.byte[1] = getch(); address.byte[1] = getch();
nothing_response(); nothing_response();
} }
/* Universal SPI programming command, disabled. Would be used for fuses and lock bits. */ /* Universal SPI programming command, disabled. Would be used for fuses and lock bits. */
else if(ch=='V') { else if (ch == 'V') {
getNch(4); getNch(4);
byte_response(0x00); byte_response(0x00);
} }
/* Write memory, length is big endian and is in bytes */ /* Write memory, length is big endian and is in bytes */
else if(ch=='d') { else if (ch == 'd') {
length.byte[1] = getch(); length.byte[1] = getch();
length.byte[0] = getch(); length.byte[0] = getch();
flags.eeprom = 0; flags.eeprom = 0;
if (getch() == 'E') flags.eeprom = 1; if (getch() == 'E') flags.eeprom = 1;
for (w=0;w<length.word;w++) { for (w=0; w<length.word; w++) {
buff[w] = getch(); // Store data in buffer, can't keep up with serial data stream whilst programming pages buff[w] = getch(); // Store data in buffer, can't keep up with serial data stream whilst programming pages
} }
if (getch() == ' ') { if (getch() == ' ') {
if (flags.eeprom) { //Write to EEPROM one byte at a time if (flags.eeprom) { //Write to EEPROM one byte at a time
for(w=0;w<length.word;w++) { for(w=0;w<length.word;w++) {
eeprom_wb(address.word,buff[w]); eeprom_wb(address.word,buff[w]);
address.word++; address.word++;
} }
} else { //Write to FLASH one page at a time } else { //Write to FLASH one page at a time
//if (address.byte[1]>127) address_high = 0x01; //Only possible with m128, m256 will need 3rd address byte. FIXME
//else address_high = 0x00;
//address.word = address.word << 1; //address * 2 -> byte location
//if ((length.byte[0] & 0x01)) length.word++; //Even up an odd number of bytes
cli(); //Disable interrupts, just to be sure cli(); //Disable interrupts, just to be sure
while(bit_is_set(EECR,EEWE)); //Wait for previous EEPROM writes to complete while(bit_is_set(EECR,EEWE)); //Wait for previous EEPROM writes to complete
asm volatile( asm volatile(
"clr r17 \n\t" //page_word_count "clr r17 \n\t" //page_word_count
"lds r30,address \n\t" //Address of FLASH location (in words) "lds r30,address \n\t" //Address of FLASH location (in words)
"lds r31,address+1 \n\t" "lds r31,address+1 \n\t"
"lsl r30 \n\t" //address * 2 -> byte location "lsl r30 \n\t" //address * 2 -> byte location
"rol r31 \n\t" "rol r31 \n\t"
"ldi r28,lo8(buff) \n\t" //Start of buffer array in RAM "ldi r28,lo8(buff) \n\t" //Start of buffer array in RAM
"ldi r29,hi8(buff) \n\t" "ldi r29,hi8(buff) \n\t"
"lds r24,length \n\t" //Length of data to be written (in bytes) "lds r24,length \n\t" //Length of data to be written (in bytes)
"lds r25,length+1 \n\t" "lds r25,length+1 \n\t"
"sbrs r24,0 \n\t" //Even up an odd number of bytes "sbrs r24,0 \n\t" //Even up an odd number of bytes
"rjmp length_loop \n\t" "rjmp length_loop \n\t"
"adiw r24,1 \n\t" "adiw r24,1 \n\t"
"length_loop: \n\t" //Main loop, repeat for number of words in block "length_loop: \n\t" //Main loop, repeat for number of words in block
"cpi r17,0x00 \n\t" //If page_word_count=0 then erase page "cpi r17,0x00 \n\t" //If page_word_count=0 then erase page
"brne no_page_erase \n\t" "brne no_page_erase \n\t"
"rcall wait_spm \n\t" "rcall wait_spm \n\t"
// "wait_spm1: \n\t"
// "lds r16,%0 \n\t" //Wait for previous spm to complete
// "andi r16,1 \n\t"
// "cpi r16,1 \n\t"
// "breq wait_spm1 \n\t"
"ldi r16,0x03 \n\t" //Erase page pointed to by Z
"sts %0,r16 \n\t"
"spm \n\t"
"rcall wait_spm \n\t"
// "wait_spm2: \n\t"
// "lds r16,%0 \n\t" //Wait for previous spm to complete
// "andi r16,1 \n\t"
// "cpi r16,1 \n\t"
// "breq wait_spm2 \n\t"
"ldi r16,0x11 \n\t" //Re-enable RWW section
"sts %0,r16 \n\t"
"spm \n\t"
"no_page_erase: \n\t"
"ld r0,Y+ \n\t" //Write 2 bytes into page buffer
"ld r1,Y+ \n\t"
"rcall wait_spm \n\t" "ldi r16,0x03 \n\t" //Erase page pointed to by Z
// "wait_spm3: \n\t" "sts %0,r16 \n\t"
// "lds r16,%0 \n\t" //Wait for previous spm to complete "spm \n\t"
// "andi r16,1 \n\t" "rcall wait_spm \n\t"
// "cpi r16,1 \n\t"
// "breq wait_spm3 \n\t"
"ldi r16,0x01 \n\t" //Load r0,r1 into FLASH page buffer
"sts %0,r16 \n\t"
"spm \n\t"
"inc r17 \n\t" //page_word_count++ "ldi r16,0x11 \n\t" //Re-enable RWW section
"cpi r17,%1 \n\t" "sts %0,r16 \n\t"
"brlo same_page \n\t" //Still same page in FLASH "spm \n\t"
"write_page: \n\t" "no_page_erase: \n\t"
"clr r17 \n\t" //New page, write current one first "ld r0,Y+ \n\t" //Write 2 bytes into page buffer
"rcall wait_spm \n\t" "ld r1,Y+ \n\t"
// "wait_spm4: \n\t"
// "lds r16,%0 \n\t" //Wait for previous spm to complete
// "andi r16,1 \n\t"
// "cpi r16,1 \n\t"
// "breq wait_spm4 \n\t"
"ldi r16,0x05 \n\t" //Write page pointed to by Z
"sts %0,r16 \n\t"
"spm \n\t"
"rcall wait_spm \n\t"
// "wait_spm5: \n\t"
// "lds r16,%0 \n\t" //Wait for previous spm to complete
// "andi r16,1 \n\t"
// "cpi r16,1 \n\t"
// "breq wait_spm5 \n\t"
"ldi r16,0x11 \n\t" //Re-enable RWW section
"sts %0,r16 \n\t"
"spm \n\t"
"same_page: \n\t"
"adiw r30,2 \n\t" //Next word in FLASH
"sbiw r24,2 \n\t" //length-2
"breq final_write \n\t" //Finished
"rjmp length_loop \n\t"
"wait_spm: \n\t" "rcall wait_spm \n\t"
"lds r16,%0 \n\t" //Wait for previous spm to complete
"andi r16,1 \n\t"
"cpi r16,1 \n\t"
"breq wait_spm \n\t"
"ret \n\t"
"final_write: \n\t" "ldi r16,0x01 \n\t" //Load r0,r1 into FLASH page buffer
"cpi r17,0 \n\t" "sts %0,r16 \n\t"
"breq block_done \n\t" "spm \n\t"
"adiw r24,2 \n\t" //length+2, fool above check on length after short page write
"rjmp write_page \n\t" "inc r17 \n\t" //page_word_count++
"block_done: \n\t" "cpi r17,%1 \n\t"
"clr __zero_reg__ \n\t" //restore zero register "brlo same_page \n\t" //Still same page in FLASH
: "=m" (SPMCR) : "M" (PAGE_SIZE) : "r0","r16","r17","r24","r25","r28","r29","r30","r31"); "write_page: \n\t"
"clr r17 \n\t" //New page, write current one first
"rcall wait_spm \n\t"
"ldi r16,0x05 \n\t" //Write page pointed to by Z
"sts %0,r16 \n\t"
"spm \n\t"
"rcall wait_spm \n\t"
"ldi r16,0x11 \n\t" //Re-enable RWW section
"sts %0,r16 \n\t"
"spm \n\t"
"same_page: \n\t"
"adiw r30,2 \n\t" //Next word in FLASH
"sbiw r24,2 \n\t" //length-2
"breq final_write \n\t" //Finished
"rjmp length_loop \n\t"
"wait_spm: \n\t"
"lds r16,%0 \n\t" //Wait for previous spm to complete
"andi r16,1 \n\t"
"cpi r16,1 \n\t"
"breq wait_spm \n\t"
"ret \n\t"
"final_write: \n\t"
"cpi r17,0 \n\t"
"breq block_done \n\t"
"adiw r24,2 \n\t" //length+2, fool above check on length after short page write
"rjmp write_page \n\t"
"block_done: \n\t"
"clr __zero_reg__ \n\t" //restore zero register
: "=m" (SPMCR) : "M" (PAGE_SIZE) : "r0","r16","r17","r24","r25","r28","r29","r30","r31");
/* Should really add a wait for RWW section to be enabled, don't actually need it since we never */ /* Should really add a wait for RWW section to be enabled, don't actually need it since we never */
/* exit the bootloader without a power cycle anyhow */ /* exit the bootloader without a power cycle anyhow */
@ -406,17 +347,17 @@ int main(void)
} }
/* Read memory block mode, length is big endian. */ /* Read memory block mode, length is big endian. */
else if(ch=='t') { else if (ch == 't') {
length.byte[1] = getch(); length.byte[1] = getch();
length.byte[0] = getch(); length.byte[0] = getch();
if (getch() == 'E') flags.eeprom = 1; if (getch() == 'E') flags.eeprom = 1;
else { else {
flags.eeprom = 0; flags.eeprom = 0;
address.word = address.word << 1; // address * 2 -> byte location address.word = address.word << 1; // address * 2 -> byte location
} }
if (getch() == ' ') { // Command terminator if (getch() == ' ') { // Command terminator
putch(0x14); putch(0x14);
for (w=0;w < length.word;w++) { // Can handle odd and even lengths okay for (w=0; w < length.word; w++) { // Can handle odd and even lengths okay
if (flags.eeprom) { // Byte access EEPROM read if (flags.eeprom) { // Byte access EEPROM read
putch(eeprom_rb(address.word)); putch(eeprom_rb(address.word));
address.word++; address.word++;
@ -426,82 +367,68 @@ int main(void)
} }
} }
putch(0x10); putch(0x10);
} }
} }
/* Get device signature bytes */ /* Get device signature bytes */
else if(ch=='u') { else if (ch == 'u') {
if (getch() == ' ') { if (getch() == ' ') {
putch(0x14); putch(0x14);
putch(SIG1); putch(SIG1);
putch(SIG2); putch(SIG2);
putch(SIG3); putch(SIG3);
putch(0x10); putch(0x10);
} }
} }
/* Read oscillator calibration byte */ /* Read oscillator calibration byte */
else if(ch=='v') { else if (ch == 'v') {
byte_response(0x00); byte_response(0x00);
} }
// } else {
// time_count++;
// if (time_count>=MAX_TIME_COUNT) {
// app_start();
// }
// }
} /* end of forever loop */ } /* end of forever loop */
} }
void putch(char ch) void putch(char ch)
{ {
/* m8 */ /* m8 */
while (!(inb(UCSRA) & _BV(UDRE))); while (!(inb(UCSRA) & _BV(UDRE)));
outb(UDR,ch); outb(UDR,ch);
} }
char getch(void) char getch(void)
{ {
/* m8 */ /* m8 */
uint32_t count = 0; uint32_t count = 0;
while(!(inb(UCSRA) & _BV(RXC))) { while(!(inb(UCSRA) & _BV(RXC))) {
/* HACKME:: here is a good place to count times*/ /* HACKME:: here is a good place to count times*/
count++; count++;
if (count > MAX_TIME_COUNT) if (count > MAX_TIME_COUNT)
app_start(); app_start();
} }
return (inb(UDR)); return (inb(UDR));
} }
void getNch(uint8_t count) void getNch(uint8_t count)
{ {
uint8_t i; uint8_t i;
for(i=0;i<count;i++) { for(i=0;i<count;i++) {
/* m8 */
//while(!(inb(UCSRA) & _BV(RXC)));
//inb(UDR);
getch(); // need to handle time out getch(); // need to handle time out
} }
} }
void byte_response(uint8_t val) void byte_response(uint8_t val)
{ {
if (getch() == ' ') { if (getch() == ' ') {
putch(0x14); putch(0x14);
putch(val); putch(val);
putch(0x10); putch(0x10);
} }
} }
void nothing_response(void) void nothing_response(void)
{ {
if (getch() == ' ') { if (getch() == ' ') {
putch(0x14); putch(0x14);
putch(0x10); putch(0x10);
} }
} }
/* end of file ATmegaBOOT.c */

2
keyboard/avr/main.c
View File

@ -11,7 +11,7 @@
#define DELAY_ROW_SWITCH() _delay_ms(1) //_delay_us(1) #define DELAY_ROW_SWITCH() _delay_ms(1) //_delay_us(1)
#define BAUDRATE 9600 #define BAUDRATE 19200
/* Keycode from include/linux/input.h */ /* Keycode from include/linux/input.h */
#define KEY_RESERVED 0 #define KEY_RESERVED 0

2
printer/avr/main.c
View File

@ -4,7 +4,7 @@
#include <stdio.h> #include <stdio.h>
#include <avr/pgmspace.h> #include <avr/pgmspace.h>
#define BAUDRATE 9600 #define BAUDRATE 19200
inline void spi_process_data(); inline void spi_process_data();