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commitin new I2C code for stm32 - LPC21 guys, please forgive me if I broke something

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This commit is contained in:
Antoine Drouin
2010-08-17 13:49:23 +00:00
parent 639882b2b0
commit 1eedab7a78
2 changed files with 87 additions and 29 deletions
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sw/airborne/i2c.c
+32 -11
View File
@@ -71,6 +71,8 @@ void i2c0_transceive(uint8_t slave_addr, uint8_t len_w, uint16_t len_r, volatile
#ifdef USE_I2C1
struct i2c i2c1;
volatile uint8_t i2c1_status;
volatile uint8_t i2c1_buf[I2C1_BUF_LEN];
volatile uint16_t i2c1_len_r;
@@ -120,43 +122,62 @@ void i2c1_transceive(uint8_t slave_addr, uint8_t len_w, uint16_t len_r, volatile
#ifdef USE_I2C2
struct I2C2_P i2c2;
#include "booz/booz2_debug.h"
struct i2c i2c2;
void i2c2_init(void) {
i2c2.status = I2C_IDLE;
i2c2.status = I2CIdle;
i2c2.finished = NULL;
i2c2_hw_init();
}
void i2c2_receive(uint8_t slave_addr, uint8_t len, volatile bool_t* finished) {
i2c2.direction = I2CDirRx;
MY_ASSERT((i2c2.status == I2CIdle) || (i2c2.status == I2CComplete) || (i2c2.status == I2CFailed));
i2c2.transaction = I2CTransRx;
i2c2.slave_addr = slave_addr;
i2c2.len_r = len;
i2c2.finished = finished;
if (finished) *finished = FALSE;
i2c2.status = I2C_BUSY;
I2c2SendStart();
i2c2.index = 0;
I2C_AcknowledgeConfig(I2C2, ENABLE);
i2c2.status = I2CStartRequested;
I2C_ZERO_EVENTS();
// I2c2SendStart();
I2C_ITConfig(I2C2, I2C_IT_EVT, ENABLE);
I2C_GenerateSTART(I2C2, ENABLE);
}
void i2c2_transmit(uint8_t slave_addr, uint8_t len, volatile bool_t* finished) {
i2c2.direction = I2CDirTx;
MY_ASSERT((i2c2.status == I2CIdle) || (i2c2.status == I2CComplete) || (i2c2.status == I2CFailed));
i2c2.transaction = I2CTransTx;
i2c2.slave_addr = slave_addr;
i2c2.len_w = len;
i2c2.finished = finished;
if (finished) *finished = FALSE;
i2c2.status = I2C_BUSY;
I2c2SendStart();
i2c2.index = 0;
i2c2.status = I2CStartRequested;
I2C_ZERO_EVENTS();
// I2c2SendStart();
I2C_ITConfig(I2C2, I2C_IT_EVT, ENABLE);
I2C_GenerateSTART(I2C2, ENABLE);
}
void i2c2_transceive(uint8_t slave_addr, uint8_t len_w, uint16_t len_r, volatile bool_t* finished) {
i2c2.direction = I2CDirTxRx;
MY_ASSERT((i2c2.status == I2CIdle) || (i2c2.status == I2CComplete) || (i2c2.status == I2CFailed));
i2c2.transaction = I2CTransTxRx;
i2c2.slave_addr = slave_addr;
i2c2.len_w = len_w;
i2c2.len_r = len_r;
i2c2.finished = finished;
if (finished) *finished = FALSE;
i2c2.status = I2C_BUSY;
I2c2SendStart();
i2c2.index = 0;
I2C_AcknowledgeConfig(I2C2, ENABLE);
i2c2.status = I2CStartRequested;
I2C_ZERO_EVENTS();
// I2c2SendStart();
I2C_ITConfig(I2C2, I2C_IT_EVT, ENABLE);
I2C_GenerateSTART(I2C2, ENABLE);
}
sw/airborne/i2c.h
+55 -18
View File
@@ -5,6 +5,59 @@
#include "i2c_hw.h"
enum I2CTransaction {
I2CTransTx,
I2CTransRx,
I2CTransTxRx
};
enum I2CStatus {
I2CIdle,
I2CStartRequested,
I2CAddrWrSent,
I2CAddrRdSent,
I2CSendingByte,
I2CSendingLastByte,
I2CReadingByte,
I2CReadingLastByte,
I2CStopRequested,
I2CRestartRequested,
I2CComplete,
I2CFailed
};
#ifndef I2C_BUF_LEN
#define I2C_BUF_LEN 32
#endif
struct i2c {
volatile enum I2CStatus status;
volatile enum I2CTransaction transaction;
volatile uint8_t slave_addr;
volatile uint16_t len_r;
volatile uint8_t len_w;
volatile bool_t stop_after_transmit;
volatile uint8_t index;
volatile bool_t* finished;
volatile uint8_t buf[I2C_BUF_LEN];
};
struct i2c_errors {
volatile uint16_t ack_fail_cnt;
volatile uint16_t miss_start_stop_cnt;
volatile uint16_t arb_lost_cnt;
volatile uint16_t over_under_cnt;
volatile uint16_t pec_recep_cnt;
volatile uint16_t timeout_tlow_cnt;
volatile uint16_t smbus_alert_cnt;
volatile uint16_t unexpected_event_cnt;
volatile uint32_t last_unexpected_event;
volatile uint32_t er_irq_cnt;
volatile uint32_t irq_cnt;
volatile uint32_t event_chain[16];
volatile enum I2CStatus status_chain[16];
};
#define I2C_START 0x08
#define I2C_RESTART 0x10
@@ -114,6 +167,7 @@ extern void i2c1_transmit(uint8_t slave_addr, uint8_t len, volatile bool_t* fini
extern void i2c1_transceive(uint8_t slave_addr, uint8_t len_w, uint16_t len_r, volatile bool_t* finished);
extern volatile uint8_t i2c1_status;
extern struct i2c i2c1;
#ifndef I2C1_BUF_LEN
#define I2C1_BUF_LEN 16
@@ -189,25 +243,8 @@ extern volatile bool_t* i2c1_finished;
#ifdef USE_I2C2
#ifndef I2C2_BUF_LEN
#define I2C2_BUF_LEN 32
#endif
enum I2CDirection { I2CDirTx, I2CDirRx, I2CDirTxRx };
struct I2C2_P {
volatile uint8_t status;
enum I2CDirection direction;
volatile uint8_t slave_addr;
volatile uint16_t len_r;
volatile uint8_t len_w;
volatile bool_t stop_after_transmit;
volatile uint8_t index;
volatile bool_t* finished;
volatile uint8_t buf[I2C2_BUF_LEN];
};
extern struct I2C2_P i2c2;
extern struct i2c i2c2;
extern void i2c2_init(void);
extern void i2c2_receive(uint8_t slave_addr, uint8_t len, volatile bool_t* finished);