EMTime/libopencm3-examples
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Correct the F3 examples hardfaults in rare cases, correct style

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This commit is contained in:
Frantisek Burian
2014-01-01 13:41:33 +01:00
committed by Piotr Esden-Tempski
parent 3efd9f8675
commit 72c1a29779
7 changed files with 286 additions and 296 deletions
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145
examples/stm32/f3/stm32f3-discovery/i2c/i2c.c
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@@ -43,86 +43,91 @@
#define LD8 GPIOE, GPIO14
#define LD6 GPIOE, GPIO15
void i2c_setup(void) {
rcc_peripheral_enable_clock(&RCC_APB1ENR, RCC_APB1ENR_I2C1EN);
rcc_peripheral_enable_clock(&RCC_AHBENR, RCC_AHBENR_IOPBEN);
rcc_set_i2c_clock_hsi(I2C1);
static void i2c_setup(void)
{
rcc_peripheral_enable_clock(&RCC_APB1ENR, RCC_APB1ENR_I2C1EN);
rcc_peripheral_enable_clock(&RCC_AHBENR, RCC_AHBENR_IOPBEN);
rcc_set_i2c_clock_hsi(I2C1);
i2c_reset(I2C1);
/* Setup GPIO pin GPIO_USART2_TX/GPIO9 on GPIO port A for transmit. */
gpio_mode_setup(GPIOB, GPIO_MODE_AF, GPIO_PUPD_NONE, GPIO6 | GPIO7);
gpio_set_af(GPIOB, GPIO_AF4, GPIO6| GPIO7);
i2c_peripheral_disable(I2C1);
//configure ANFOFF DNF[3:0] in CR1
i2c_enable_analog_filter(I2C1);
i2c_set_digital_filter(I2C1, I2C_CR1_DNF_DISABLED);
//Configure PRESC[3:0] SDADEL[3:0] SCLDEL[3:0] SCLH[7:0] SCLL[7:0] in TIMINGR
i2c_100khz_i2cclk8mhz(I2C1);
//configure No-Stretch CR1 (only relevant in slave mode)
i2c_enable_stretching(I2C1);
//addressing mode
i2c_set_7bit_addr_mode(I2C1);
i2c_peripheral_enable(I2C1);
i2c_reset(I2C1);
/* Setup GPIO pin GPIO_USART2_TX/GPIO9 on GPIO port A for transmit. */
gpio_mode_setup(GPIOB, GPIO_MODE_AF, GPIO_PUPD_NONE, GPIO6 | GPIO7);
gpio_set_af(GPIOB, GPIO_AF4, GPIO6| GPIO7);
i2c_peripheral_disable(I2C1);
//configure ANFOFF DNF[3:0] in CR1
i2c_enable_analog_filter(I2C1);
i2c_set_digital_filter(I2C1, I2C_CR1_DNF_DISABLED);
//Configure PRESC[3:0] SDADEL[3:0] SCLDEL[3:0] SCLH[7:0] SCLL[7:0]
// in TIMINGR
i2c_100khz_i2cclk8mhz(I2C1);
//configure No-Stretch CR1 (only relevant in slave mode)
i2c_enable_stretching(I2C1);
//addressing mode
i2c_set_7bit_addr_mode(I2C1);
i2c_peripheral_enable(I2C1);
}
void usart_setup(void) {
/* Enable clocks for GPIO port A (for GPIO_USART2_TX) and USART2. */
rcc_peripheral_enable_clock(&RCC_APB1ENR, RCC_APB1ENR_USART2EN);
rcc_peripheral_enable_clock(&RCC_AHBENR, RCC_AHBENR_IOPAEN);
static void usart_setup(void)
{
/* Enable clocks for GPIO port A (for GPIO_USART2_TX) and USART2. */
rcc_peripheral_enable_clock(&RCC_APB1ENR, RCC_APB1ENR_USART2EN);
rcc_peripheral_enable_clock(&RCC_AHBENR, RCC_AHBENR_IOPAEN);
/* Setup GPIO pin GPIO_USART2_TX/GPIO9 on GPIO port A for transmit. */
gpio_mode_setup(GPIOA, GPIO_MODE_AF, GPIO_PUPD_NONE, GPIO2 | GPIO3);
gpio_set_af(GPIOA, GPIO_AF7, GPIO2| GPIO3);
/* Setup GPIO pin GPIO_USART2_TX/GPIO9 on GPIO port A for transmit. */
gpio_mode_setup(GPIOA, GPIO_MODE_AF, GPIO_PUPD_NONE, GPIO2 | GPIO3);
gpio_set_af(GPIOA, GPIO_AF7, GPIO2| GPIO3);
/* Setup UART parameters. */
usart_set_baudrate(USART2, 115200);
usart_set_databits(USART2, 8);
usart_set_stopbits(USART2, USART_STOPBITS_1);
usart_set_mode(USART2, USART_MODE_TX_RX);
usart_set_parity(USART2, USART_PARITY_NONE);
usart_set_flow_control(USART2, USART_FLOWCONTROL_NONE);
/* Setup UART parameters. */
usart_set_baudrate(USART2, 115200);
usart_set_databits(USART2, 8);
usart_set_stopbits(USART2, USART_STOPBITS_1);
usart_set_mode(USART2, USART_MODE_TX_RX);
usart_set_parity(USART2, USART_PARITY_NONE);
usart_set_flow_control(USART2, USART_FLOWCONTROL_NONE);
/* Finally enable the USART. */
usart_enable(USART2);
/* Finally enable the USART. */
usart_enable(USART2);
}
void gpio_setup(void)
static void gpio_setup(void)
{
rcc_peripheral_enable_clock(&RCC_AHBENR, RCC_AHBENR_IOPEEN);
gpio_mode_setup(GPIOE, GPIO_MODE_OUTPUT, GPIO_PUPD_NONE, GPIO8| GPIO9| GPIO10| GPIO11| GPIO12| GPIO13| GPIO14| GPIO15);
gpio_mode_setup(GPIOE, GPIO_MODE_OUTPUT, GPIO_PUPD_NONE,
GPIO8 | GPIO9 | GPIO10 | GPIO11 | GPIO12 | GPIO13 |
GPIO14 | GPIO15);
}
void my_usart_print_int(uint32_t usart, int32_t value)
static void my_usart_print_int(uint32_t usart, int32_t value)
{
int8_t i;
int8_t nr_digits = 0;
char buffer[25];
int8_t i;
int8_t nr_digits = 0;
char buffer[25];
if (value < 0) {
usart_send_blocking(usart, '-');
value = value * -1;
}
if (value < 0) {
usart_send_blocking(usart, '-');
value = value * -1;
}
if (value == 0) {
usart_send_blocking(usart, '0');
}
if (value == 0) {
usart_send_blocking(usart, '0');
}
while (value > 0) {
buffer[nr_digits++] = "0123456789"[value % 10];
value /= 10;
}
while (value > 0) {
buffer[nr_digits++] = "0123456789"[value % 10];
value /= 10;
}
for (i = nr_digits-1; i >= 0; i--) {
usart_send_blocking(usart, buffer[i]);
}
for (i = nr_digits-1; i >= 0; i--) {
usart_send_blocking(usart, buffer[i]);
}
usart_send_blocking(usart, '\r');
usart_send_blocking(usart, '\n');
usart_send_blocking(usart, '\r');
usart_send_blocking(usart, '\n');
}
void clock_setup(void) {
/*rcc_clock_setup_hsi(&hsi_8mhz[CLOCK_44MHZ]);*/
rcc_clock_setup_hsi(&hsi_8mhz[CLOCK_64MHZ]);
static void clock_setup(void)
{
rcc_clock_setup_hsi(&hsi_8mhz[CLOCK_64MHZ]);
}
#define I2C_ACC_ADDR 0x19
@@ -155,16 +160,16 @@ int main(void)
while (1) {
read_i2c(I2C1, I2C_ACC_ADDR, ACC_STATUS, 1, data);
/*my_usart_print_int(USART2, data[0]);*/
read_i2c(I2C1, I2C_ACC_ADDR, ACC_OUT_X_L_A, 1, data);
acc_x=data[0];
read_i2c(I2C1, I2C_ACC_ADDR, ACC_OUT_X_H_A, 1, data);
acc_x|=(data[0] << 8);
my_usart_print_int(USART2, (int16_t) acc_x);
//int i;
//for (i = 0; i < 800000; i++) /* Wait a bit. */
// __asm__("nop");
read_i2c(I2C1, I2C_ACC_ADDR, ACC_STATUS, 1, data);
/*my_usart_print_int(USART2, data[0]);*/
read_i2c(I2C1, I2C_ACC_ADDR, ACC_OUT_X_L_A, 1, data);
acc_x=data[0];
read_i2c(I2C1, I2C_ACC_ADDR, ACC_OUT_X_H_A, 1, data);
acc_x|=(data[0] << 8);
my_usart_print_int(USART2, (int16_t) acc_x);
//int i;
//for (i = 0; i < 800000; i++) /* Wait a bit. */
// __asm__("nop");
}
return 0;