diff options
Diffstat (limited to 'os/hal/ports/TIVA/LLD/I2C/hal_i2c_lld.c')
| -rw-r--r-- | os/hal/ports/TIVA/LLD/I2C/hal_i2c_lld.c | 37 |
1 files changed, 32 insertions, 5 deletions
diff --git a/os/hal/ports/TIVA/LLD/I2C/hal_i2c_lld.c b/os/hal/ports/TIVA/LLD/I2C/hal_i2c_lld.c index 3b49d6c..cf70dca 100644 --- a/os/hal/ports/TIVA/LLD/I2C/hal_i2c_lld.c +++ b/os/hal/ports/TIVA/LLD/I2C/hal_i2c_lld.c @@ -30,6 +30,33 @@ /* Driver local definitions. */ /*===========================================================================*/ +// interrupt states +#define STATE_IDLE 0 +#define STATE_WRITE_NEXT 1 +#define STATE_WRITE_FINAL 2 +#define STATE_WAIT_ACK 3 +#define STATE_SEND_ACK 4 +#define STATE_READ_ONE 5 +#define STATE_READ_FIRST 6 +#define STATE_READ_NEXT 7 +#define STATE_READ_FINAL 8 +#define STATE_READ_WAIT 9 + +#define TIVA_I2C_SIGNLE_SEND (I2C_MCS_RUN | I2C_MCS_START | I2C_MCS_STOP) +#define TIVA_I2C_BURST_SEND_START (I2C_MCS_RUN | I2C_MCS_START) +#define TIVA_I2C_BURST_SEND_CONTINUE (I2C_MCS_RUN) +#define TIVA_I2C_BURST_SEND_FINISH (I2C_MCS_RUN | I2C_MCS_STOP) +#define TIVA_I2C_BURST_SEND_STOP (I2C_MCS_STOP) +#define TIVA_I2C_BURST_SEND_ERROR_STOP (I2C_MCS_STOP) + +#define TIVA_I2C_SINGLE_RECEIVE (I2C_MCS_RUN | I2C_MCS_START | I2C_MCS_STOP) +#define TIVA_I2C_BURST_RECEIVE_START (I2C_MCS_RUN | I2C_MCS_START | I2C_MCS_ACK) +#define TIVA_I2C_BURST_RECEIVE_CONTINUE (I2C_MCS_RUN | I2C_MCS_ACK) +#define TIVA_I2C_BURST_RECEIVE_FINISH (I2C_MCS_RUN | I2C_MCS_STOP) +#define TIVA_I2C_BURST_RECEIVE_ERROR_STOP (I2C_MCS_STOP) + +#define MTPR_VALUE ((TIVA_SYSCLK/(2*(6+4)*i2cp->config->clock_speed))-1) + /*===========================================================================*/ /* Driver constants. */ /*===========================================================================*/ @@ -134,10 +161,10 @@ static void i2c_lld_serve_interrupt(I2CDriver *i2cp) // read interrupt status status = HWREG(i2c + I2C_O_MCS); - if (status & TIVA_MCS_ERROR) { + if (status & I2C_MCS_ERROR) { i2cp->errors |= I2C_BUS_ERROR; } - if (status & TIVA_MCS_ARBLST) { + if (status & I2C_MCS_ARBLST) { i2cp->errors |= I2C_ARBITRATION_LOST; } @@ -760,7 +787,7 @@ msg_t i2c_lld_master_receive_timeout(I2CDriver *i2cp, i2caddr_t addr, /* If the bus is not busy then the operation can continue, note, the loop is exited in the locked state.*/ - if ((HWREG(i2c + I2C_O_MCS) & TIVA_MCS_BUSY) == 0) + if ((HWREG(i2c + I2C_O_MCS) & I2C_MCS_BUSY) == 0) break; /* If the system time went outside the allowed window then a timeout @@ -834,7 +861,7 @@ msg_t i2c_lld_master_transmit_timeout(I2CDriver *i2cp, i2caddr_t addr, /* If the bus is not busy then the operation can continue, note, the loop is exited in the locked state.*/ - if ((HWREG(i2c + I2C_O_MCS) & TIVA_MCS_BUSY) == 0) + if ((HWREG(i2c + I2C_O_MCS) & I2C_MCS_BUSY) == 0) break; /* If the system time went outside the allowed window then a timeout @@ -852,7 +879,7 @@ msg_t i2c_lld_master_transmit_timeout(I2CDriver *i2cp, i2caddr_t addr, HWREG(i2c + I2C_O_MSA) = i2cp->addr; /* enable interrupts */ - HWREG(i2c + I2C_O_MIMR) = TIVA_MIMR_IM; + HWREG(i2c + I2C_O_MIMR) = I2C_MIMR_IM; /* put data in register */ HWREG(i2c + I2C_O_MDR) = *(i2cp->txbuf); |