#include #include #include #include #include #include #include #include #include #define ARRAY_SIZE(a) (sizeof(a) / sizeof((a)[0])) static void pabort(const char *s) { perror(s); abort(); } // LCM(bits) = 1440 to be even on a row boundary // => Blocksize 180 bytes, 3 rows #define MINBLK 180 #define BLKMUL 4 #define PLSIZE (MINBLK*BLKMUL + 3) #define ROWSPERBLOCK (3 * BLKMUL) #define BLKCNT (128 / ROWSPERBLOCK) + 1 int get_addr(int x, int y) { int byteno; byteno = (y * 480 + x) / 8; if (x % 8 || byteno % 9) { printf("ERROR: Invalid get_addr offset. Must be on 9 byte boundary.\n"); return -1; } byteno -= byteno / 9; printf("addr = %d\n", byteno); return byteno; } // Row must be multiple of 3 static void transfer(int fd, uint8_t *memory) { int ret; uint8_t *tx; //uint8_t *rx; int i; int txlen; int addr; int blk; txlen = PLSIZE; //tx = malloc(txlen * sizeof(uint8_t)); //rx = malloc(PLSIZE * sizeof(uint8_t)); tx = memory; struct spi_ioc_transfer tr = { .tx_buf = (unsigned long)tx, .rx_buf = (unsigned long)NULL, .len = txlen, .delay_usecs = 10, .speed_hz = 0, .bits_per_word = 0, }; for (blk = 0; blk < BLKCNT; ++blk) { printf("tx = %d\n", tx - memory); addr = get_addr(0, blk * ROWSPERBLOCK); tx[0] = 0x00; // Opcode: 0 tx[1] = (addr >> 8) & 0xFF; // Base addr: tx[2] = addr & 0xFF; tr.tx_buf = (unsigned long)tx; // TODO tr.len = txlen; ret = ioctl(fd, SPI_IOC_MESSAGE(1), &tr); if (ret == 1) pabort("can't send spi message"); tx += ROWSPERBLOCK * (480/8); } /* for (ret = 0; ret < PLSIZE; ret++) { if (!(ret % 6)) puts(""); printf("%.2X ", rx[ret]); } puts(""); */ //free(tx); //free(rx); } int main(int argc, char *argv[]) { int fd; int ret; int i; char temp; static uint8_t mode = 0; static uint8_t bits = 8; static uint32_t speed = 2000000; uint8_t memory[480*128/8 + 3]; uint8_t *image = memory + 3; for (i = 0; i < 0; i++) { printf("%3d: %d\n", i, get_addr(i, 0)); if ((i+1)%8 == 0) { printf("\n"); } } fd = open("/dev/spidev0.0", O_RDWR); if (fd < 0) pabort("can't open device"); /* * spi mode */ ret = ioctl(fd, SPI_IOC_WR_MODE, &mode); if (ret == -1) pabort("can't set spi mode"); ret = ioctl(fd, SPI_IOC_RD_MODE, &mode); if (ret == -1) pabort("can't get spi mode"); /* * bits per word */ ret = ioctl(fd, SPI_IOC_WR_BITS_PER_WORD, &bits); if (ret == -1) pabort("can't set bits per word"); ret = ioctl(fd, SPI_IOC_RD_BITS_PER_WORD, &bits); if (ret == -1) pabort("can't get bits per word"); /* * max speed hz */ ret = ioctl(fd, SPI_IOC_WR_MAX_SPEED_HZ, &speed); if (ret == -1) pabort("can't set max speed hz"); ret = ioctl(fd, SPI_IOC_RD_MAX_SPEED_HZ, &speed); if (ret == -1) pabort("can't get max speed hz"); //printf("spi mode: %d\n", mode); //printf("bits per word: %d\n", bits); //printf("max speed: %d Hz (%d KHz)\n", speed, speed/1000); for (i = 3; i < ARRAY_SIZE(memory); i++) { memory[i] = i*8/480; fread(&temp, 1,1, stdin); if (i < 720+3) memory[i] = 0xAA; else if (i < 720*2+3) memory[i] = 0xFF; else memory[i] = 0x55; memory[i] = temp; //rx[i] = 0; } transfer(fd, memory); close(fd); }