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stm32l1/i2c.c: adapt for new periph driver interface

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This commit is contained in:
René Herthel 2015-10-15 15:24:33 +02:00
parent 6c8d63bcac
commit e9215a6cc1
4 changed files with 96 additions and 165 deletions
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35
boards/limifrog-v1/include/periph_conf.h
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@ -136,40 +136,25 @@ static const timer_conf_t timer_config[] = {
#define I2C_NUMOF (2U) #define I2C_NUMOF (2U)
#define I2C_0_EN 1 #define I2C_0_EN 1
#define I2C_1_EN 1 #define I2C_1_EN 1
static const i2c_conf_t i2c_cfg[] = {
/* Device, SCL-, SDA-Pin, AF, Event-, Error-IRQ, Clock enable */
{I2C1, GPIO_PIN(PORT_B, 8), GPIO_PIN(PORT_B, 9), 4,
I2C1_EV_IRQn, I2C1_ER_IRQn, RCC_APB1ENR_I2C1EN},
{I2C2, GPIO_PIN(PORT_B, 10), GPIO_PIN(PORT_B, 11), 4,
I2C2_EV_IRQn, I2C2_ER_IRQn, RCC_APB1ENR_I2C2EN},
};
#define I2C_IRQ_PRIO 1 #define I2C_IRQ_PRIO 1
#define I2C_APBCLK (36000000U) #define I2C_APBCLK (36000000U)
/* I2C 0 device configuration */ /* I2C 0 device configuration */
#define I2C_0_DEV I2C1
#define I2C_0_CLKEN() (RCC->APB1ENR |= RCC_APB1ENR_I2C1EN)
#define I2C_0_CLKDIS() (RCC->APB1ENR &= ~(RCC_APB1ENR_I2C1EN))
#define I2C_0_EVT_IRQ I2C1_EV_IRQn
#define I2C_0_EVT_ISR isr_i2c1_ev #define I2C_0_EVT_ISR isr_i2c1_ev
#define I2C_0_ERR_IRQ I2C1_ER_IRQn
#define I2C_0_ERR_ISR isr_i2c1_er #define I2C_0_ERR_ISR isr_i2c1_er
/* I2C 0 pin configuration */
#define I2C_0_PORT_CLKEN() (RCC->AHBENR |= RCC_AHBENR_GPIOBEN)
#define I2C_0_PORT GPIOB
#define I2C_0_SCL_PIN 8
#define I2C_0_SCL_AF 4
#define I2C_0_SDA_PIN 9
#define I2C_0_SDA_AF 4
/* I2C 1 device configuration */ /* I2C 1 device configuration [ST VL6180X, ST LSM6DS3, ST LIS3MDL, ST SLPS25H]*/
#define I2C_1_DEV I2C2 /* ST VL6180X, ST LSM6DS3, ST LIS3MDL, ST SLPS25H */
#define I2C_1_CLKEN() (RCC->APB1ENR |= RCC_APB1ENR_I2C2EN)
#define I2C_1_CLKDIS() (RCC->APB1ENR &= ~(RCC_APB1ENR_I2C2EN))
#define I2C_1_EVT_IRQ I2C2_EV_IRQn
#define I2C_1_EVT_ISR isr_i2c2_ev #define I2C_1_EVT_ISR isr_i2c2_ev
#define I2C_1_ERR_IRQ I2C2_ER_IRQn
#define I2C_1_ERR_ISR isr_i2c2_er #define I2C_1_ERR_ISR isr_i2c2_er
/* I2C 1 pin configuration */
#define I2C_1_PORT_CLKEN() (RCC->AHBENR |= RCC_AHBENR_GPIOBEN)
#define I2C_1_PORT GPIOB
#define I2C_1_SCL_PIN 10
#define I2C_1_SCL_AF 4
#define I2C_1_SDA_PIN 11
#define I2C_1_SDA_AF 4
/** @} */ /** @} */
#ifdef __cplusplus #ifdef __cplusplus

28
boards/nucleo-l1/include/periph_conf.h
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@ -238,26 +238,28 @@ static const timer_conf_t timer_config[] = {
* @name I2C configuration * @name I2C configuration
* @{ * @{
*/ */
#define I2C_NUMOF (1U) #define I2C_NUMOF (2U)
#define I2C_0_EN 1 #define I2C_0_EN 1
#define I2C_1_EN 1
static const i2c_conf_t i2c_cfg[] = {
/* Device, SCL-, SDA-Pin, AF, Event-, Error-IRQ, Clock enable */
{I2C1, GPIO_PIN(PORT_B, 8), GPIO_PIN(PORT_B, 9), 4,
I2C1_EV_IRQn, I2C1_ER_IRQn, RCC_APB1ENR_I2C1EN},
{I2C2, GPIO_PIN(PORT_B, 10), GPIO_PIN(PORT_B, 11), 4,
I2C2_EV_IRQn, I2C2_ER_IRQn, RCC_APB1ENR_I2C2EN},
};
#define I2C_IRQ_PRIO 1 #define I2C_IRQ_PRIO 1
#define I2C_APBCLK (36000000U) #define I2C_APBCLK (36000000U)
/* I2C 0 device configuration */ /* I2C 0 device configuration */
#define I2C_0_DEV I2C1
#define I2C_0_CLKEN() (RCC->APB1ENR |= RCC_APB1ENR_I2C1EN)
#define I2C_0_CLKDIS() (RCC->APB1ENR &= ~(RCC_APB1ENR_I2C1EN))
#define I2C_0_EVT_IRQ I2C1_EV_IRQn
#define I2C_0_EVT_ISR isr_i2c1_ev #define I2C_0_EVT_ISR isr_i2c1_ev
#define I2C_0_ERR_IRQ I2C1_ER_IRQn
#define I2C_0_ERR_ISR isr_i2c1_er #define I2C_0_ERR_ISR isr_i2c1_er
/* I2C 0 pin configuration */
#define I2C_0_PORT_CLKEN() (RCC->AHBENR |= RCC_AHBENR_GPIOBEN) /* I2C 1 device configuration */
#define I2C_0_PORT GPIOB #define I2C_1_EVT_ISR isr_i2c2_ev
#define I2C_0_SCL_PIN 8 #define I2C_1_ERR_ISR isr_i2c2_er
#define I2C_0_SCL_AF 4
#define I2C_0_SDA_PIN 9
#define I2C_0_SDA_AF 4
/** @} */ /** @} */
#ifdef __cplusplus #ifdef __cplusplus

13
cpu/stm32l1/include/periph_cpu.h
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@ -108,6 +108,19 @@ typedef struct {
#define PERIPH_SPI_NEEDS_TRANSFER_REGS #define PERIPH_SPI_NEEDS_TRANSFER_REGS
/** @} */ /** @} */
/**
* @brief I2C device configuration
*/
typedef struct {
I2C_TypeDef *dev; /**< Pointer to the used I2C device */
gpio_t scl_pin; /**< Pin used for SCL */
gpio_t sda_pin; /**< Pin used for SDA */
uint8_t af_scl_sda; /**< SCL or SDA AF */
uint8_t ev_irqn; /**< I2C device Event Interrupt */
uint8_t er_irqn; /**< I2C device Error Interrupt */
uint32_t clk_en; /**< Clock enable register */
} i2c_conf_t;
#ifdef __cplusplus #ifdef __cplusplus
} }
#endif #endif

179
cpu/stm32l1/periph/i2c.c
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@ -34,13 +34,10 @@
#define ENABLE_DEBUG (0) #define ENABLE_DEBUG (0)
#include "debug.h" #include "debug.h"
/* guard file in case no I2C device is defined */
#if I2C_NUMOF
/* static function definitions */ /* static function definitions */
static void _i2c_init(I2C_TypeDef *i2c, int ccr); static void _i2c_init(I2C_TypeDef *i2c, int ccr);
static void _toggle_pins(GPIO_TypeDef *port, int pin_scl, int pin_sda); static void _toggle_pins(GPIO_TypeDef *port, int pin_scl, int pin_sda);
static void _pin_config(GPIO_TypeDef *port, int pin_scl, int pin_sda); static void _pin_config(i2c_t dev, GPIO_TypeDef *port, int pin_scl, int pin_sda);
static void _start(I2C_TypeDef *dev, uint8_t address, uint8_t rw_flag); static void _start(I2C_TypeDef *dev, uint8_t address, uint8_t rw_flag);
static inline void _clear_addr(I2C_TypeDef *dev); static inline void _clear_addr(I2C_TypeDef *dev);
static inline void _write(I2C_TypeDef *dev, char *data, int length); static inline void _write(I2C_TypeDef *dev, char *data, int length);
@ -57,18 +54,16 @@ static mutex_t locks[] = {
[I2C_1] = MUTEX_INIT, [I2C_1] = MUTEX_INIT,
#endif #endif
#if I2C_2_EN #if I2C_2_EN
[I2C_2] = MUTEX_INIT [I2C_2] = MUTEX_INIT,
#endif #endif
#if I2C_3_EN #if I2C_3_EN
[I2C_3] = MUTEX_INIT [I2C_3] = MUTEX_INIT,
#endif #endif
}; };
int i2c_init_master(i2c_t dev, i2c_speed_t speed) int i2c_init_master(i2c_t dev, i2c_speed_t speed)
{ {
I2C_TypeDef *i2c; I2C_TypeDef *i2c = i2c_cfg[dev].dev;
GPIO_TypeDef *port;
int pin_scl = 0, pin_sda = 0;
int ccr; int ccr;
/* read speed configuration */ /* read speed configuration */
@ -85,27 +80,16 @@ int i2c_init_master(i2c_t dev, i2c_speed_t speed)
return -2; return -2;
} }
/* read static device configuration */ i2c_poweron(dev);
switch (dev) {
#if I2C_0_EN
case I2C_0:
i2c = I2C_0_DEV;
port = I2C_0_PORT;
pin_scl = I2C_0_SCL_PIN;
pin_sda = I2C_0_SDA_PIN;
I2C_0_CLKEN();
I2C_0_PORT_CLKEN();
NVIC_SetPriority(I2C_0_ERR_IRQ, I2C_IRQ_PRIO);
NVIC_EnableIRQ(I2C_0_ERR_IRQ);
break;
#endif
default: /* I2C port clk enable */
return -1; RCC->AHBENR |= RCC_AHBENR_GPIOBEN;
}
NVIC_SetPriority(i2c_cfg[dev].er_irqn, I2C_IRQ_PRIO);
NVIC_EnableIRQ(i2c_cfg[dev].er_irqn);
/* configure pins */ /* configure pins */
_pin_config(port, pin_scl, pin_sda); _pin_config(dev, GPIOB, i2c_cfg[dev].scl_pin, i2c_cfg[dev].sda_pin);
/* configure device */ /* configure device */
_i2c_init(i2c, ccr); _i2c_init(i2c, ccr);
@ -116,9 +100,9 @@ int i2c_init_master(i2c_t dev, i2c_speed_t speed)
/* disable peripheral */ /* disable peripheral */
i2c->CR1 &= ~I2C_CR1_PE; i2c->CR1 &= ~I2C_CR1_PE;
/* toggle both pins to reset analog filter */ /* toggle both pins to reset analog filter */
_toggle_pins(port, pin_scl, pin_sda); _toggle_pins(GPIOB, i2c_cfg[dev].scl_pin, i2c_cfg[dev].sda_pin);
/* reset pins for alternate function */ /* reset pins for alternate function */
_pin_config(port, pin_scl, pin_sda); _pin_config(dev, GPIOB, i2c_cfg[dev].scl_pin, i2c_cfg[dev].sda_pin);
/* make peripheral soft reset */ /* make peripheral soft reset */
i2c->CR1 |= I2C_CR1_SWRST; i2c->CR1 |= I2C_CR1_SWRST;
i2c->CR1 &= ~I2C_CR1_SWRST; i2c->CR1 &= ~I2C_CR1_SWRST;
@ -142,7 +126,7 @@ static void _i2c_init(I2C_TypeDef *i2c, int ccr)
i2c->CR1 |= I2C_CR1_PE; i2c->CR1 |= I2C_CR1_PE;
} }
static void _pin_config(GPIO_TypeDef *port, int pin_scl, int pin_sda) static void _pin_config(i2c_t dev, GPIO_TypeDef *port, int pin_scl, int pin_sda)
{ {
/* Set GPIOs to AF mode */ /* Set GPIOs to AF mode */
port->MODER &= ~(3 << (2 * pin_scl)); port->MODER &= ~(3 << (2 * pin_scl));
@ -167,20 +151,20 @@ static void _pin_config(GPIO_TypeDef *port, int pin_scl, int pin_sda)
/* Configure GPIOs to for the I2C alternate function */ /* Configure GPIOs to for the I2C alternate function */
if (pin_scl < 8) { if (pin_scl < 8) {
port->AFR[0] &= ~(0xf << (4 * pin_scl)); port->AFR[0] &= ~(0xf << (4 * pin_scl));
port->AFR[0] |= (I2C_0_SCL_AF << (4 * pin_scl)); port->AFR[0] |= (i2c_cfg[dev].af_scl_sda << (4 * pin_scl));
} }
else { else {
port->AFR[1] &= ~(0xf << (4 * (pin_scl - 8))); port->AFR[1] &= ~(0xf << (4 * (pin_scl - 8)));
port->AFR[1] |= (I2C_0_SCL_AF << (4 * (pin_scl - 8))); port->AFR[1] |= (i2c_cfg[dev].af_scl_sda << (4 * (pin_scl - 8)));
} }
if (pin_sda < 8) { if (pin_sda < 8) {
port->AFR[0] &= ~(0xf << (4 * pin_sda)); port->AFR[0] &= ~(0xf << (4 * pin_sda));
port->AFR[0] |= (I2C_0_SDA_AF << (4 * pin_sda)); port->AFR[0] |= (i2c_cfg[dev].af_scl_sda << (4 * pin_sda));
} }
else { else {
port->AFR[1] &= ~(0xf << (4 * (pin_sda - 8))); port->AFR[1] &= ~(0xf << (4 * (pin_sda - 8)));
port->AFR[1] |= (I2C_0_SDA_AF << (4 * (pin_sda - 8))); port->AFR[1] |= (i2c_cfg[dev].af_scl_sda << (4 * (pin_sda - 8)));
} }
} }
@ -215,18 +199,12 @@ static void _toggle_pins(GPIO_TypeDef *port, int pin_scl, int pin_sda)
int i2c_acquire(i2c_t dev) int i2c_acquire(i2c_t dev)
{ {
if (dev >= I2C_NUMOF) {
return -1;
}
mutex_lock(&locks[dev]); mutex_lock(&locks[dev]);
return 0; return 0;
} }
int i2c_release(i2c_t dev) int i2c_release(i2c_t dev)
{ {
if (dev >= I2C_NUMOF) {
return -1;
}
mutex_unlock(&locks[dev]); mutex_unlock(&locks[dev]);
return 0; return 0;
} }
@ -240,18 +218,7 @@ int i2c_read_bytes(i2c_t dev, uint8_t address, char *data, int length)
{ {
unsigned int state; unsigned int state;
int i = 0; int i = 0;
I2C_TypeDef *i2c; I2C_TypeDef *i2c = i2c_cfg[dev].dev;
switch (dev) {
#if I2C_0_EN
case I2C_0:
i2c = I2C_0_DEV;
break;
#endif
default:
return -1;
}
switch (length) { switch (length) {
case 1: case 1:
@ -369,18 +336,7 @@ int i2c_read_reg(i2c_t dev, uint8_t address, uint8_t reg, char *data)
int i2c_read_regs(i2c_t dev, uint8_t address, uint8_t reg, char *data, int length) int i2c_read_regs(i2c_t dev, uint8_t address, uint8_t reg, char *data, int length)
{ {
I2C_TypeDef *i2c; I2C_TypeDef *i2c = i2c_cfg[dev].dev;
switch (dev) {
#if I2C_0_EN
case I2C_0:
i2c = I2C_0_DEV;
break;
#endif
default:
return -1;
}
/* send start condition and slave address */ /* send start condition and slave address */
DEBUG("Send slave address and clear ADDR flag\n"); DEBUG("Send slave address and clear ADDR flag\n");
@ -400,23 +356,7 @@ int i2c_write_byte(i2c_t dev, uint8_t address, char data)
int i2c_write_bytes(i2c_t dev, uint8_t address, char *data, int length) int i2c_write_bytes(i2c_t dev, uint8_t address, char *data, int length)
{ {
I2C_TypeDef *i2c; I2C_TypeDef *i2c = i2c_cfg[dev].dev;
switch (dev) {
#if I2C_0_EN
case I2C_0:
i2c = I2C_0_DEV;
break;
#endif
#if I2C_1_EN
case I2C_1:
i2c = I2C_1_DEV;
break;
#endif
default:
return -1;
}
/* start transmission and send slave address */ /* start transmission and send slave address */
DEBUG("sending start sequence\n"); DEBUG("sending start sequence\n");
@ -438,18 +378,7 @@ int i2c_write_reg(i2c_t dev, uint8_t address, uint8_t reg, char data)
int i2c_write_regs(i2c_t dev, uint8_t address, uint8_t reg, char *data, int length) int i2c_write_regs(i2c_t dev, uint8_t address, uint8_t reg, char *data, int length)
{ {
I2C_TypeDef *i2c; I2C_TypeDef *i2c = i2c_cfg[dev].dev;
switch (dev) {
#if I2C_0_EN
case I2C_0:
i2c = I2C_0_DEV;
break;
#endif
default:
return -1;
}
/* start transmission and send slave address */ /* start transmission and send slave address */
_start(i2c, address, I2C_FLAG_WRITE); _start(i2c, address, I2C_FLAG_WRITE);
@ -466,36 +395,13 @@ int i2c_write_regs(i2c_t dev, uint8_t address, uint8_t reg, char *data, int leng
void i2c_poweron(i2c_t dev) void i2c_poweron(i2c_t dev)
{ {
switch (dev) { RCC->APB1ENR |= i2c_cfg[dev].clk_en;
#if I2C_0_EN
case I2C_0:
I2C_0_CLKEN();
break;
#endif
#if I2C_1_EN
case I2C_1:
I2C_1_CLKEN();
break;
#endif
}
} }
void i2c_poweroff(i2c_t dev) void i2c_poweroff(i2c_t dev)
{ {
switch (dev) { while (i2c_cfg[dev].dev->SR2 & I2C_SR2_BUSY);
#if I2C_0_EN RCC->APB1ENR &= ~(i2c_cfg[dev].clk_en);
case I2C_0:
while (I2C_0_DEV->SR2 & I2C_SR2_BUSY);
I2C_0_CLKDIS();
break;
#endif
#if I2C_1_EN
case I2C_1:
while (I2C_0_DEV->SR2 & I2C_SR2_BUSY);
I2C_0_CLKDIS();
break;
#endif
}
} }
static void _start(I2C_TypeDef *dev, uint8_t address, uint8_t rw_flag) static void _start(I2C_TypeDef *dev, uint8_t address, uint8_t rw_flag)
@ -555,11 +461,10 @@ static inline void _stop(I2C_TypeDef *dev)
dev->CR1 |= I2C_CR1_STOP; dev->CR1 |= I2C_CR1_STOP;
} }
#if I2C_0_EN
void I2C_0_ERR_ISR(void) void I2C_0_ERR_ISR(void)
{ {
unsigned state = I2C_0_DEV->SR1; unsigned state = I2C1->SR1;
DEBUG("\n\n### I2C ERROR OCCURED ###\n"); DEBUG("\n\n### I2C_0 ERROR OCCURED ###\n");
DEBUG("status: %08x\n", state); DEBUG("status: %08x\n", state);
if (state & I2C_SR1_OVR) { if (state & I2C_SR1_OVR) {
DEBUG("OVR\n"); DEBUG("OVR\n");
@ -584,6 +489,32 @@ void I2C_0_ERR_ISR(void)
} }
while (1); while (1);
} }
#endif /* I2C_0_EN */
#endif /* I2C_NUMOF */ void I2C_1_ERR_ISR(void)
{
unsigned state = I2C2->SR1;
DEBUG("\n\n### I2C_1 ERROR OCCURED ###\n");
DEBUG("status: %08x\n", state);
if (state & I2C_SR1_OVR) {
DEBUG("OVR\n");
}
if (state & I2C_SR1_AF) {
DEBUG("AF\n");
}
if (state & I2C_SR1_ARLO) {
DEBUG("ARLO\n");
}
if (state & I2C_SR1_BERR) {
DEBUG("BERR\n");
}
if (state & I2C_SR1_PECERR) {
DEBUG("PECERR\n");
}
if (state & I2C_SR1_TIMEOUT) {
DEBUG("TIMEOUT\n");
}
if (state & I2C_SR1_SMBALERT) {
DEBUG("SMBALERT\n");
}
while (1);
}