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Author SHA1 Message Date
Markus Koch 53e24d88b8 wip 2021-03-02 19:37:55 +01:00
Markus Koch 5e93258f5e wip 2021-02-25 17:52:24 +01:00
9 changed files with 62 additions and 111 deletions

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@ -1,18 +1 @@
# WS2812B light signal - CPU Board
Board to run [colorchord2](https://github.com/cnlohr/colorchord) on a string of WS2812B LEDs with live line-in audio.
## Errata (Rev 01)
* Opamp inverting / non-inverting inputs are swapped
* Workaround: Lift pads 2 and 3, and 5 and 6, and connect them crossed using magnet wire.
* Opamp is not rail-to-rail and does not allow to use the ADC in full range
* Workaround: Only use limited range -640 to 520.
* LED footprint is wrong.
* Workaround: Flip 180 degrees and solder shifted onto the right pads, then use magnet wire to connect the remaining two pads.
* Serial boot loader non-functional (uses incompatible UART I/Os).
* Workaround: Program via JTAG / SWD.
* Missing level shifters for WS2812B LEDs (RX)
* Workaround: Don't use WS2812B RX inputs on the board
* Missing level shifters for WS2812B LEDs (TX)
* Workaround: The first LED will kinda sorta do the level shifting for you, but sometimes fail to display correctly. Just ignore its erratic blinking.
# Sabik WS2812B light signal - CPU Board

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@ -13,8 +13,9 @@ OD=$(PREFIX)-objdump
OBJCOPYFLAGS = -O binary
BIN=$(CP) -O ihex
CCBASE = colorchord/embeddedstm32f407
DEFS = -DSTM32F40_41xxx -DHSE_VALUE=8000000 -DREVISION=\"`git describe --match=NeVeRmAtCh --always --abbrev=40 --dirty`\"
DEFS = -DSTM32F40_41xxx -DHSE_VALUE=8000000
STARTUP = $(CCBASE)/lib/startup_stm32f40_41xxx.s
STLIB = $(CCBASE)/STM32F4xx_StdPeriph_Driver
EMCOM = $(CCBASE)/../embeddedcommon

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@ -13,6 +13,8 @@ void adc_init()
ADC_CommonInitTypeDef ADC_CommonInitStruct;
ADC_InitTypeDef ADC_InitStructure;
GPIO_InitTypeDef GPIO_InitStruct;
printf("ADC init\r\n");
// Enable Clocks
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA, ENABLE);
@ -28,7 +30,7 @@ void adc_init()
// Set up timer
TIM_TimeBaseInitTypeDef Timer_InitStruct;
TIM_TimeBaseStructInit(&Timer_InitStruct);
Timer_InitStruct.TIM_Prescaler = 0;
Timer_InitStruct.TIM_Prescaler = 0x0;
Timer_InitStruct.TIM_CounterMode = TIM_CounterMode_Up;
Timer_InitStruct.TIM_Period = (ADC_F_TIM / ADC_SAMPLE_RATE);
Timer_InitStruct.TIM_ClockDivision = TIM_CKD_DIV1;
@ -44,7 +46,7 @@ void adc_init()
TIM_OC1Init (TIM5, &TIM_OCInitStructure);
TIM_SetCompare1(TIM5, 0xFFFF);
// Let's leave the interrupt disabled until we are done configuring everything
TIM_ITConfig(TIM5, TIM_IT_CC1, ENABLE);
TIM_CCxCmd(TIM5, TIM_Channel_1, TIM_CCx_Enable);
TIM_CCxNCmd(TIM5, TIM_Channel_1, TIM_CCx_Enable);
@ -125,38 +127,44 @@ void adc_init()
// Turn it all on
ADC_Cmd(ADC1, ENABLE);
ADC_DMACmd(ADC1, ENABLE);
}
void adc_start()
{
TIM_ITConfig(TIM5, TIM_IT_CC1, ENABLE);
printf("adc init done.\r\n");
printf("ADC CR1: %08x, CR2: %08x\r\n", ADC1->CR1, ADC1->CR2);
printf("ADC SQR1: %08x, SQR3: %08x\r\n", ADC1->SQR1, ADC1->SQR3);
printf("DMA2 S0CR: %08x\r\n", ADC_RX_DMA_STREAM->CR);
printf("ADC init complete.\r\n");
}
void DMA2_Stream0_IRQHandler()
{
{
int sample;
int peaking;
DMA_ClearFlag(ADC_RX_DMA_STREAM, DMA_FLAG_TCIF0);
sample = ((adc_buffer[0] + adc_buffer[1]) / 2) - 2048;
peaking = (adc_buffer[0] < -640+2048) || (adc_buffer[0] > 520+2048);
peaking |= (adc_buffer[1] < -640+2048) || (adc_buffer[1] > 520+2048);
GotSample(sample, peaking);
//printf("[DMA-IRQ] %d, %d\r\n", adc_buffer[0], adc_buffer[1]);
//sample = 2048 - ((adc_buffer[0] + adc_buffer[1]) / 2);
sample = 2048 - adc_buffer[0];
//printf("ADC0: %4d, ADC1: %4d, SMP: %4d\r\n",
// adc_buffer[0], adc_buffer[1], sample);
GotSample(sample);
}
// Only for debugging. Currently disabled.
// Not used:
void ADC_IRQHandler()
{
ADC_ClearFlag(ADC1, ADC_FLAG_EOC);
// printf("[ADC-IRQ] %d, %d\r\n", adc_buffer[0], adc_buffer[1]);
//printf("[ADC-IRQ] %d, %d\r\n", adc_buffer[0], adc_buffer[1]);
}
void TIM5_IRQHandler()
{
TIM_ClearFlag(TIM5, TIM_FLAG_CC1);
// I would really like to this in HW via events, but somehow it's broken...
/*static int s=0;
s=!s;
if (s) {
LED_ON2;
} else {
LED_OFF2;
}*/
ADC_SoftwareStartConv(ADC1);
}

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@ -11,6 +11,5 @@
// TODO: Update the IRQ handler in adc.c when updating the stream / channel.
void adc_init();
void adc_start();
#endif

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@ -2,8 +2,8 @@
#define _CCCONFIG_H
#define CCEMBEDDED
#define NUM_LIN_LEDS 60
#define USE_NUM_LIN_LEDS 60
#define NUM_LIN_LEDS 48
#define USE_NUM_LIN_LEDS 48
#define DFREQ (40000)
#endif

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@ -168,9 +168,8 @@ void ConfigureUART()
void ConfigureLED()
{
ConfigureGPIO(LED_RED, INOUT_OUT);
ConfigureGPIO(LED_GREEN, INOUT_OUT);
ConfigureGPIO(LED_BLUE, INOUT_OUT);
ConfigureGPIO(LEDPIN, INOUT_OUT);
ConfigureGPIO(LEDPIN2, INOUT_OUT);
}
uint8_t GetGPIOFromString( const char * str )
@ -264,29 +263,3 @@ void ConfigureGPIO( uint8_t gpio, int parameters )
GPIO_Init(GPIOOf(gpio), &GPIO_InitStructure);
}
void JumpToBootloader(void) {
// Many thanks to https://stm32f4-discovery.net/2017/04/tutorial-jump-system-memory-software-stm32/
void (*SysMemBootJump)(void);
volatile uint32_t addr = 0x1FFF0000;
RCC_DeInit();
// Disable and reset systick
SysTick->CTRL = 0;
SysTick->LOAD = 0;
SysTick->VAL = 0;
__disable_irq();
// Remap system memory
SYSCFG->MEMRMP = 0x01;
SysMemBootJump = (void (*)(void)) (*((uint32_t *)(addr + 4)));
// Set main stack pointer
__set_MSP(*(uint32_t *)addr);
// Jump
SysMemBootJump();
}

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@ -51,19 +51,19 @@ void ConfigureGPIO( gpio gpio, int parameters );
#define LEDPIN 0x18
#elif defined( STM32F40_41xxx )
#define LEDPIN (16+13)
#define LEDPIN2 (16+14)
#endif
#define LED_GREEN (LEDPIN+0)
#define LED_BLUE (LEDPIN+1)
#define LED_RED (LEDPIN+2)
void ConfigureUART();
void ConfigureLED();
#define LED_TOGGLE {GPIOOf(LEDPIN)->ODR^=(1<<((LEDPIN)&0x0f));}
#define LED_ON GPIOOn(LEDPIN)
#define LED_OFF GPIOOff(LEDPIN)
void JumpToBootloader(void);
#define LED_ON2 GPIOOn(LEDPIN2)
#define LED_OFF2 GPIOOff(LEDPIN2)
#define LED_ON(p) GPIOOn(p)
#define LED_OFF(p) GPIOOff(p)
#endif

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@ -25,20 +25,17 @@ int16_t sampbuff[CIRCBUFSIZE];
volatile int samples;
//This gets called by the ADC/Microphone
void GotSample(int samp, int peaking)
void GotSample( int samp )
{
//printf("[GOT-SMP] %d\r\n", samp);
sampbuff[last_samp_pos] = samp;
last_samp_pos = ((last_samp_pos+1)%CIRCBUFSIZE);
samples++;
if (peaking) {
LED_ON(LED_RED);
} else if (samp > 128) {
LED_ON(LED_BLUE);
if (samp > 128) {
LED_ON2;
} else {
LED_OFF(LED_BLUE);
// Red LED reset in main loop
LED_OFF2;
}
}
@ -116,8 +113,10 @@ int main(void)
uint32_t i = 0;
RCC_GetClocksFreq( &RCC_Clocks );
ConfigureLED();
ConfigureLED();
LED_OFF;
// SysTick end of count event each 10ms
SysTick_Config( RCC_Clocks.HCLK_Frequency / 100);
@ -130,14 +129,15 @@ int main(void)
InitSPI2812();
adc_init();
printf("\r\nThis is Sabik-CPU, commit %s.\r\n", REVISION);
printf("Operating at %.3fMHz.\r\n", fv );
printf("Operating at %.3fMHz\r\n", fv );
int this_samp = 0;
int wf = 0;
LED_ON;
LED_ON2;
int c = 1;
LED_ON(LED_RED);
while (1) {
for (int a=0; a < NUM_LIN_LEDS; a++) {
ledOut[a*3 + 0] = c/2;
@ -148,31 +148,17 @@ int main(void)
SendSPI2812(ledOut, NUM_LIN_LEDS);
_delay_us(10*1000);
c++;
if (c==16) {
LED_OFF(LED_RED);
LED_ON(LED_BLUE);
} else if (c==32) {
LED_OFF(LED_BLUE);
LED_ON(LED_GREEN);
} else if (c==48) {
LED_OFF(LED_GREEN);
} else if (c==64) {
if (c==64)
break;
}
}
LED_OFF(LED_RED);
LED_OFF(LED_GREEN);
LED_OFF(LED_BLUE);
LED_OFF2;
SendSPI2812(ledOut, NUM_LIN_LEDS);
adc_start();
while(1)
{
if( this_samp != last_samp_pos )
{
LED_OFF(LED_GREEN); //Use led on the board to show us how much CPU we're using. (You can also probe PB15)
LED_OFF; //Use led on the board to show us how much CPU we're using. (You can also probe PB15)
PushSample32( sampbuff[this_samp] ); //Can't put in full volume. (here was /2)
@ -183,11 +169,10 @@ int main(void)
{
NewFrame();
wf = 0;
LED_OFF(LED_RED);
}
LED_ON(LED_GREEN);
LED_ON;
}
LED_ON(LED_GREEN); //Take up a little more time to make sure we don't miss this.
LED_ON; //Take up a little more time to make sure we don't miss this.
}
}

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@ -132,6 +132,8 @@ void InitSPI2812()
DMA_InitTypeDef dma_init_struct;
GPIO_InitTypeDef GPIO_InitStructure;
NVIC_InitTypeDef nvic_init_struct;
printf("Init SPI2812: sizeof(MyBuffer)=%d\r\n", sizeof(MyBuffer));
#ifdef STM32F30X