diff options
Diffstat (limited to 'fw/fe310/eos/soc/spi9bit.c')
| -rw-r--r-- | fw/fe310/eos/soc/spi9bit.c | 20 |
1 files changed, 16 insertions, 4 deletions
diff --git a/fw/fe310/eos/soc/spi9bit.c b/fw/fe310/eos/soc/spi9bit.c index e48e9e2..a536637 100644 --- a/fw/fe310/eos/soc/spi9bit.c +++ b/fw/fe310/eos/soc/spi9bit.c @@ -11,10 +11,10 @@ #include "spi9bit.h" #define BIT_GET ((GPIO_REG(GPIO_INPUT_VAL) & (1 << IOF_SPI1_MISO)) >> IOF_SPI1_MISO) -#define BIT_PUT(b) { clear_csr(mstatus, MSTATUS_MIE); if (b) GPIO_REG(GPIO_OUTPUT_VAL) |= (1 << IOF_SPI1_MOSI); else GPIO_REG(GPIO_OUTPUT_VAL) &= ~(1 << IOF_SPI1_MOSI); set_csr(mstatus, MSTATUS_MIE); } +#define BIT_PUT(b) { if (b) GPIO_REG(GPIO_OUTPUT_VAL) |= (1 << IOF_SPI1_MOSI); else GPIO_REG(GPIO_OUTPUT_VAL) &= ~(1 << IOF_SPI1_MOSI); } -#define SCK_UP { clear_csr(mstatus, MSTATUS_MIE); GPIO_REG(GPIO_OUTPUT_VAL) |= (1 << IOF_SPI1_SCK); set_csr(mstatus, MSTATUS_MIE); } -#define SCK_DN { clear_csr(mstatus, MSTATUS_MIE); GPIO_REG(GPIO_OUTPUT_VAL) &= ~(1 << IOF_SPI1_SCK); set_csr(mstatus, MSTATUS_MIE); } +#define SCK_UP { GPIO_REG(GPIO_OUTPUT_VAL) |= (1 << IOF_SPI1_SCK); } +#define SCK_DN { GPIO_REG(GPIO_OUTPUT_VAL) &= ~(1 << IOF_SPI1_SCK); } static inline void _sleep(int n) { volatile int x = n; @@ -22,7 +22,19 @@ static inline void _sleep(int n) { while(x) x--; } -/* sck frequency for r/w operations is 0.8Mhz */ +void eos_spi9bit_start(void) { + GPIO_REG(GPIO_OUTPUT_EN) |= (1 << IOF_SPI1_SCK); + GPIO_REG(GPIO_OUTPUT_EN) |= (1 << IOF_SPI1_MOSI); + GPIO_REG(GPIO_INPUT_EN) |= (1 << IOF_SPI1_MISO); +} + +void eos_spi9bit_stop(void) { + GPIO_REG(GPIO_OUTPUT_EN) &= ~(1 << IOF_SPI1_SCK); + GPIO_REG(GPIO_OUTPUT_EN) &= ~(1 << IOF_SPI1_MOSI); + GPIO_REG(GPIO_INPUT_EN) &= ~(1 << IOF_SPI1_MISO); +} + +/* sck frequency for r/w operations is ~ 0.8Mhz */ void eos_spi9bit_read(uint8_t *data) { int i; |