diff options
Diffstat (limited to 'board/tqc')
| -rw-r--r-- | board/tqc/tqm5200/cmd_stk52xx.c | 23 |
1 files changed, 12 insertions, 11 deletions
diff --git a/board/tqc/tqm5200/cmd_stk52xx.c b/board/tqc/tqm5200/cmd_stk52xx.c index 0789c58..c40f7f0 100644 --- a/board/tqc/tqm5200/cmd_stk52xx.c +++ b/board/tqc/tqm5200/cmd_stk52xx.c @@ -82,18 +82,17 @@ static void spi_init(void) static int spi_transmit(unsigned char data) { - int dummy; struct mpc5xxx_spi *spi = (struct mpc5xxx_spi*)MPC5XXX_SPI; spi->dr = data; /* wait for SPI transmission completed */ - while(!(spi->sr & 0x80)) - { - if (spi->sr & 0x40) /* if write collision occured */ - { + while (!(spi->sr & 0x80)) { + if (spi->sr & 0x40) { /* if write collision occured */ + int dummy; + /* do dummy read to clear status register */ dummy = spi->dr; - printf ("SPI write collision\n"); + printf("SPI write collision: dr=0x%x\n", dummy); return -1; } } @@ -172,10 +171,8 @@ static void i2s_init(void) psc->ccr = 0x1F03; /* 16 bit data width; 5.617MHz MCLK */ psc->ctur = 0x0F; /* 16 bit frame width */ - for(i=0;i<128;i++) - { + for (i = 0; i < 128; i++) psc->psc_buffer_32 = 0; /* clear tx fifo */ - } } static int i2s_play_wave(unsigned long addr, unsigned long len) @@ -183,7 +180,6 @@ static int i2s_play_wave(unsigned long addr, unsigned long len) unsigned long i; unsigned char *wave_file = (uchar *)addr + 44; /* quick'n dirty: skip * wav header*/ - unsigned char swapped[4]; struct mpc5xxx_psc *psc = (struct mpc5xxx_psc*)MPC5XXX_PSC2; /* @@ -192,11 +188,16 @@ static int i2s_play_wave(unsigned long addr, unsigned long len) psc->command = (PSC_RX_ENABLE | PSC_TX_ENABLE); for(i = 0;i < (len / 4); i++) { + unsigned char swapped[4]; + unsigned long *p = (unsigned long*)swapped; + swapped[3] = *wave_file++; swapped[2] = *wave_file++; swapped[1] = *wave_file++; swapped[0] = *wave_file++; - psc->psc_buffer_32 = *((unsigned long*)swapped); + + psc->psc_buffer_32 = *p; + while (psc->tfnum > 400) { if(ctrlc()) return 0; |