static int
accel_init(void)
{
i2c_init(i2c);
i2c_master_enable(i2c, 0);
return 0;
}
/*---------------------------------------------------------------------------*/
void
i2c_master_interface_init(void)
{
if (!initialized) {
struct i2c_master_config config_i2c_master;
/* Toggle SCL for some time, this solves I2C periperhal problem */
struct port_config pin_conf;
port_get_config_defaults(&pin_conf);
pin_conf.direction = PORT_PIN_DIR_OUTPUT;
port_pin_set_config(PIN_PA13, &pin_conf);
for (int i = 0; i < 1000; i++) {
port_pin_toggle_output_level(PIN_PA13);
clock_wait(CLOCK_SECOND / 1000);
}
/* Initialize config structure and software module. */
i2c_master_get_config_defaults(&config_i2c_master);
config_i2c_master.baud_rate = 400;
config_i2c_master.pinmux_pad0 = SENSORS_I2C_SERCOM_PINMUX_PAD0;
config_i2c_master.pinmux_pad1 = SENSORS_I2C_SERCOM_PINMUX_PAD1;
/* Initialize and enable device with config. */
i2c_master_init(&i2c_master_instance, SENSORS_I2C_MODULE, &config_i2c_master);
i2c_master_enable(&i2c_master_instance);
initialized = true;
}
}
void TwoWire::setClock(uint32_t frequencyHz)
{
if (frequencyHz<=40000)
{
switch(frequencyHz)
{
case 1000000:
dev_flags &= ~(I2C_FAST_MODE);
dev_flags |= I2C_FAST_MODE_PLUS;// set FAST_MODE bit
break;
case 400000:
dev_flags &= ~(I2C_FAST_MODE_PLUS);
dev_flags |= I2C_FAST_MODE;// set FULL_SPEED bit
break;
case 100000:
default:
dev_flags &= ~(I2C_FAST_MODE | I2C_FAST_MODE_PLUS);// clear FAST_MODE and FULL_SPEED bits
break;
}
if (sel_hard->regs->CR1 & I2C_CR1_PE){
i2c_disable(sel_hard);
i2c_master_enable(sel_hard, dev_flags);
}
}
else
{
uint32 hz = (frequencyHz > 1200000) ? 1200000 : frequencyHz;
i2c_overclock(sel_hard, hz);
}
}
//! [initialize_i2c]
void configure_EEPROM(void)
{
pinMode(WP, OUTPUT);
PinSet(WP);
/* Initialize config structure and software module. */
//! [init_conf]
struct i2c_master_config config_i2c_master;
i2c_master_get_config_defaults(&config_i2c_master);
//! [init_conf]
/* Change buffer timeout to something longer. */
//! [conf_change]
config_i2c_master.buffer_timeout = 10000;
config_i2c_master.generator_source=GCLK_GENERATOR_0;
config_i2c_master.pinmux_pad0=PINMUX_PA12C_SERCOM2_PAD0;
config_i2c_master.pinmux_pad1=PINMUX_PA13C_SERCOM2_PAD1;
//! [conf_change]
/* Initialize and enable device with config. */
//! [init_module]
i2c_master_init(&i2c_master_instance, SERCOM2, &config_i2c_master);
/*BAUD=GCLK0freq(48Mhz)*Thigh
/i.e SCLfreq=GCLK/(2*Baud)*/
REG_SERCOM2_I2CM_BAUD=200; //force baud rate after above setting gives around 100Khz
//! [enable_module]
i2c_master_enable(&i2c_master_instance);
//! [enable_module]
}
uint8 HardWire::process() {
int8 res = i2c_master_xfer(sel_hard, &itc_msg, 1, 0);
if (res != 0) {
i2c_disable(sel_hard);
i2c_master_enable(sel_hard, (I2C_BUS_RESET | dev_flags));
}
return 0;
}
/*---------------------------------------------------------------------------*/
void
bme280_arch_i2c_read_mem(uint8_t addr, uint8_t reg, uint8_t *buf, uint8_t bytes)
{
i2c_master_enable();
if(i2c_single_send(addr, reg) == I2C_MASTER_ERR_NONE) {
while(i2c_master_busy());
i2c_burst_receive(addr, buf, bytes);
}
}
void i2c_module_init()
{
msgs.data = buf;
i2c_master_enable(I2C1, I2C_FAST_MODE | I2C_SLAVE_GENERAL_CALL | I2C_SLAVE_USE_RX_BUFFER);
i2c_slave_attach_recv_handler(I2C1, pmsg, funcrx);
i2c_slave_attach_transmit_handler(I2C1, pmsg, functx);
i2c_slave_set_own_address(I2C1, 0x10); //banks_read_byte(POS_PID_BANK, REG_TWI_ADDRESS));
//i2c_slave_set_own_address2(I2C1, 0x0020);
}
/*---------------------------------------------------------------------------*/
void
bme280_arch_i2c_write_mem(uint8_t addr, uint8_t reg, uint8_t value)
{
uint8_t buf[2];
buf[0] = reg;
buf[1] = value;
i2c_master_enable();
i2c_burst_send(addr, buf, 2);
}
void i2c_init(void)
{
i2c_mutex = thinkos_mutex_alloc();
// tracef("I2C mutex=%d\n", i2c_mutex);
thinkos_mutex_lock(i2c_mutex);
i2c_master_init(100000);
i2c_master_enable();
thinkos_mutex_unlock(i2c_mutex);
}
/**
* \brief Initialize EDBG I2C communication for SAM0
*
*/
bool adp_interface_init(void)
{
enum status_code return_value;
system_init();
struct i2c_master_config config_i2c_master;
i2c_master_get_config_defaults(&config_i2c_master);
config_i2c_master.buffer_timeout = 10000;
return_value = i2c_master_init(&i2c_master_instance, EDBG_TWI, &config_i2c_master);
i2c_master_enable(&i2c_master_instance);
return return_value;
}
/**
* \internal
* \brief Test for I2C master initialization.
*
* This test initializes the i2c master module and checks whether the
* initialization is successful or not.
*
* \param test Current test case.
*/
static void run_i2c_init_test(const struct test_case *test)
{
enum status_code status;
struct i2c_master_config config_i2c_master;
i2c_master_get_config_defaults(&config_i2c_master);
config_i2c_master.buffer_timeout = 10000;
status = i2c_master_init(&i2c_master_instance, SERCOM2, &config_i2c_master);
/* Check for successful initialization */
test_assert_true(test, status == STATUS_OK,
"I2C master initialization failed");
i2c_master_enable(&i2c_master_instance);
}
void configure_i2c_master(void)
{
/* initialize config structure and software module */
struct i2c_master_config config_i2c_master;
i2c_master_get_config_defaults(&config_i2c_master);
/* change buffer timeout to something longer */
config_i2c_master.buffer_timeout = 10000;
/* initialize and enable device with config. */
i2c_master_init(&i2c_master_instance, SERCOM2, &config_i2c_master);
i2c_master_enable(&i2c_master_instance);
}
void TwoWire::begin(void)
{
rxBufferIndex = 0;
rxBufferLength = 0;
txBufferIndex = 0;
txBufferLength = 0;
i2c_master_enable(dev,I2C_BUS_RESET);
//twi_init();
}
/*
* @fn nm_bus_init
* @brief Initialize the bus wrapper
* @return M2M_SUCCESS in case of success and M2M_ERR_BUS_FAIL in case of failure
*/
sint8 nm_bus_init(void *pvinit)
{
sint8 result = M2M_SUCCESS;
#ifdef CONF_WINC_USE_I2C
/* Initialize config structure and software module. */
struct i2c_master_config config_i2c_master;
i2c_master_get_config_defaults(&config_i2c_master);
/* Change buffer timeout to something longer. */
config_i2c_master.buffer_timeout = 1000;
/* Initialize and enable device with config. */
i2c_master_init(&i2c_master_instance, SERCOM2, &config_i2c_master);
i2c_master_enable(&i2c_master_instance);
#elif defined CONF_WINC_USE_SPI
/* Structure for SPI configuration. */
struct spi_config config;
struct spi_slave_inst_config slave_config;
/* Select SPI slave CS pin. */
/* This step will set the CS high */
spi_slave_inst_get_config_defaults(&slave_config);
slave_config.ss_pin = CONF_WINC_SPI_CS_PIN;
spi_attach_slave(&slave_inst, &slave_config);
/* Configure the SPI master. */
spi_get_config_defaults(&config);
config.mux_setting = CONF_WINC_SPI_SERCOM_MUX;
config.pinmux_pad0 = CONF_WINC_SPI_PINMUX_PAD0;
config.pinmux_pad1 = CONF_WINC_SPI_PINMUX_PAD1;
config.pinmux_pad2 = CONF_WINC_SPI_PINMUX_PAD2;
config.pinmux_pad3 = CONF_WINC_SPI_PINMUX_PAD3;
config.master_slave_select_enable = false;
config.mode_specific.master.baudrate = CONF_WINC_SPI_CLOCK;
if (spi_init(&master, CONF_WINC_SPI_MODULE, &config) != STATUS_OK) {
return M2M_ERR_BUS_FAIL;
}
/* Enable the SPI master. */
spi_enable(&master);
nm_bsp_reset();
nm_bsp_sleep(1);
#endif
return result;
}
/**
* Configure I2C master.
*/
static void configure_i2c_master(void)
{
struct i2c_master_config config_i2c_master;
i2c_master_get_config_defaults(&config_i2c_master);
config_i2c_master.buffer_timeout = 10000;
config_i2c_master.pinmux_pad0 = BOOT_I2C_PAD0;
config_i2c_master.pinmux_pad1 = BOOT_I2C_PAD1;
i2c_master_init(&i2c_master_instance, SERCOM2, &config_i2c_master);
i2c_master_enable(&i2c_master_instance);
}
/**
* \brief Function for configuring I2C master module
*
* This function will configure the I2C master module with
* the SERCOM module to be used and pinmux settings
*/
static void configure_i2c_master(void)
{
/* Create and initialize config structure */
struct i2c_master_config config_i2c;
i2c_master_get_config_defaults(&config_i2c);
/* Change pins */
config_i2c.pinmux_pad0 = EDBG_I2C_SERCOM_PINMUX_PAD0;
config_i2c.pinmux_pad1 = EDBG_I2C_SERCOM_PINMUX_PAD1;
/* Initialize and enable device with config */
i2c_master_init(&i2c_master_instance, EDBG_I2C_MODULE, &config_i2c);
i2c_master_enable(&i2c_master_instance);
}
/*---------------------------------------------------------------------------*/
static uint16_t
sht25_read_reg(uint8_t reg, uint8_t *buf, uint8_t num)
{
if((buf == NULL) || (num <= 0)) {
return SHT25_ERROR;
}
i2c_master_enable();
if(i2c_single_send(SHT25_ADDR, reg) == I2C_MASTER_ERR_NONE) {
if(i2c_burst_receive(SHT25_ADDR, buf, num) == I2C_MASTER_ERR_NONE) {
return SHT25_SUCCESS;
}
}
return SHT25_ERROR;
}
void configure_i2c_master(void){
/* Initialize config structure and software module. */
struct i2c_master_config config_i2c_master;
i2c_master_get_config_defaults(&config_i2c_master);
config_i2c_master.buffer_timeout = 10000;
config_i2c_master.pinmux_pad0 = PINMUX_PA16C_SERCOM1_PAD0;
config_i2c_master.pinmux_pad1 = PINMUX_PA17C_SERCOM1_PAD1;
/* Initialize and enable device with config. */
i2c_master_init(&i2c_master_instance, SERCOM1, &config_i2c_master);
//i2c_master_reset(&i2c_master_instance);
i2c_master_enable(&i2c_master_instance);
}
uint8_t TwoWire::process() {
int8 res = i2c_master_xfer(sel_hard, itc_msg, itc_msg_count, 0);
if (res == I2C_ERROR_PROTOCOL) {
if (sel_hard->error_flags & I2C_SR1_AF) { /* NACK */
res = (sel_hard->error_flags & I2C_SR1_ADDR ? ENACKADDR :
ENACKTRNS);
} else if (sel_hard->error_flags & I2C_SR1_OVR) { /* Over/Underrun */
res = EDATA;
} else { /* Bus or Arbitration error */
res = EOTHER;
}
i2c_disable(sel_hard);
i2c_master_enable(sel_hard, (I2C_BUS_RESET | dev_flags));
}
return res;
}
static void eeprom_test_setup(void)
{
int i;
i2c_master_enable(I2C1, I2C_BUS_RESET);
buffer_r = (uint8 *) zalloc(BUFFER_SIZE);
os_assert(buffer_r != NULL);
buffer_w = (uint8 *) zalloc(BUFFER_SIZE + 1);
os_assert(buffer_w != NULL);
buffer_w[0] = 0x0;
for (i = 1; i < BUFFER_SIZE + 1; i++)
buffer_w[i] = i - 1;
os_log(LOG_DEBUG, "buffers are ready: r: 0x%x, w: 0x%x\n",
buffer_r, buffer_w);
}
/*---------------------------------------------------------------------------*/
void
i2c_init(uint8_t port_sda, uint8_t pin_sda, uint8_t port_scl, uint8_t pin_scl,
uint32_t bus_speed)
{
/* Enable I2C clock in different modes */
REG(SYS_CTRL_RCGCI2C) |= 1; /* Run mode */
/* Reset I2C peripheral */
REG(SYS_CTRL_SRI2C) |= 1; /* Reset position */
/* Delay for a little bit */
clock_delay_usec(50);
REG(SYS_CTRL_SRI2C) &= ~1; /* Normal position */
/* Set pins in input */
GPIO_SET_INPUT(GPIO_PORT_TO_BASE(port_sda), GPIO_PIN_MASK(pin_sda));
GPIO_SET_INPUT(GPIO_PORT_TO_BASE(port_scl), GPIO_PIN_MASK(pin_scl));
/* Set peripheral control for the pins */
GPIO_PERIPHERAL_CONTROL(GPIO_PORT_TO_BASE(port_sda), GPIO_PIN_MASK(pin_sda));
GPIO_PERIPHERAL_CONTROL(GPIO_PORT_TO_BASE(port_scl), GPIO_PIN_MASK(pin_scl));
/* Set the pad to no drive type */
ioc_set_over(port_sda, pin_sda, IOC_OVERRIDE_DIS);
ioc_set_over(port_scl, pin_scl, IOC_OVERRIDE_DIS);
/* Set pins as peripheral inputs */
REG(IOC_I2CMSSDA) = ioc_input_sel(port_sda, pin_sda);
REG(IOC_I2CMSSCL) = ioc_input_sel(port_scl, pin_scl);
/* Set pins as peripheral outputs */
ioc_set_sel(port_sda, pin_sda, IOC_PXX_SEL_I2C_CMSSDA);
ioc_set_sel(port_scl, pin_scl, IOC_PXX_SEL_I2C_CMSSCL);
/* Enable the I2C master module */
i2c_master_enable();
/* t the master clock frequency */
i2c_set_frequency(bus_speed);
}
//! [initialize_i2c]
void configure_i2c_master(void)
{
/* Initialize config structure and software module. */
//! [init_conf]
struct i2c_master_config config_i2c_master;
i2c_master_get_config_defaults(&config_i2c_master);
//! [init_conf]
/* Change buffer timeout to something longer. */
//! [conf_change]
config_i2c_master.buffer_timeout = 10000;
//! [conf_change]
/* Initialize and enable device with config. */
//! [init_module]
i2c_master_init(&i2c_master_instance, SERCOM2, &config_i2c_master);
//! [init_module]
//! [enable_module]
i2c_master_enable(&i2c_master_instance);
//! [enable_module]
}
void EEP_Reset()
{
i2c_master_disable(&i2c_master_instance);
pinMux(SCL, Disablemux);
pinMux(SDA, Disablemux);
pinMode(SDA,INPUT);
for (uint8_t i=0;i<9; i++)
{
PinSet(SCL);
delay_us(10);
if(PinRead(SDA))
{
break;
}
PinClr(SCL);
}
pinMux(SCL, CSERCOMmux);
pinMode(SDA,OUTPUT);
pinMux(SDA, CSERCOMmux);
i2c_master_enable(&i2c_master_instance);
I2C_STATUS|=(1<<4);
}
int main(void) {
int16 acc[3];
int16 gyro[3];
int16 mag[3];
int16 temperature = 0;
int32 pressure = 0;
int32 centimeters = 0;
i2c_master_enable(I2C1, I2C_FAST_MODE);
delay(200);
initAcc();
delay(200);
initGyro();
delay(200);
zeroCalibrateGyroscope(128,5);
compassInit(false);
compassCalibrate(1);
compassSetMode(0);
bmp085Calibration();
while(1) {
getAccelerometerData(acc); //Read acceleration
SerialUSB.print("Accel: ");
SerialUSB.print(acc[0]);
SerialUSB.print(" ");
SerialUSB.print(acc[1]);
SerialUSB.print(" ");
SerialUSB.print(acc[2]);
getGyroscopeData(gyro); //Read acceleration
SerialUSB.print(" Gyro: ");
SerialUSB.print(gyro[0]);
SerialUSB.print(" ");
SerialUSB.print(gyro[1]);
SerialUSB.print(" ");
SerialUSB.print(gyro[2]);
getMagnetometerData(mag); //Read acceleration
SerialUSB.print(" Mag: ");
SerialUSB.print(mag[0]);
SerialUSB.print(" ");
SerialUSB.print(mag[1]);
SerialUSB.print(" ");
SerialUSB.print(mag[2]);
temperature = bmp085GetTemperature(bmp085ReadUT());
pressure = bmp085GetPressure(bmp085ReadUP());
centimeters = bmp085GetAltitude();
SerialUSB.print(" Temp: ");
SerialUSB.print(temperature, DEC);
SerialUSB.print(" *0.1 deg C ");
SerialUSB.print("Pressure: ");
SerialUSB.print(pressure, DEC);
SerialUSB.print(" Pa ");
SerialUSB.print("Altitude: ");
SerialUSB.print(centimeters, DEC);
SerialUSB.print(" cm ");
SerialUSB.println(" ");
delay(100);
}
return 0;
}
/*
* @fn nm_bus_init
* @brief Initialize the bus wrapper
* @return M2M_SUCCESS in case of success and M2M_ERR_BUS_FAIL in case of failure
*/
sint8 nm_bus_init(void *pvinit)
{
sint8 result = M2M_SUCCESS;
#ifdef CONF_WINC_USE_I2C
/* Initialize config structure and software module. */
struct i2c_master_config config_i2c_master;
i2c_master_get_config_defaults(&config_i2c_master);
/* Change buffer timeout to something longer. */
config_i2c_master.buffer_timeout = 1000;
/* Initialize and enable device with config. */
i2c_master_init(&i2c_master_instance, SERCOM2, &config_i2c_master);
i2c_master_enable(&i2c_master_instance);
#elif defined CONF_WINC_USE_SPI
// hspi1.Instance = SPI1;
// hspi1.Init.Mode = SPI_MODE_MASTER;
// hspi1.Init.Direction = SPI_DIRECTION_2LINES;
// hspi1.Init.DataSize = SPI_DATASIZE_8BIT;
// hspi1.Init.CLKPolarity = SPI_POLARITY_LOW;
// hspi1.Init.CLKPhase = SPI_PHASE_1EDGE;
// hspi1.Init.NSS = SPI_NSS_SOFT;
// hspi1.Init.BaudRatePrescaler = SPI_BAUDRATEPRESCALER_4;
// hspi1.Init.FirstBit = SPI_FIRSTBIT_MSB;
// hspi1.Init.TIMode = SPI_TIMODE_DISABLED;
// hspi1.Init.CRCCalculation = SPI_CRCCALCULATION_DISABLED;
// hspi1.Init.CRCPolynomial = 10;
/* Structure for SPI configuration. */
// struct spi_config config;
// struct spi_slave_inst_config slave_config;
// /* Select SPI slave CS pin. */
// /* This step will set the CS high */
// spi_slave_inst_get_config_defaults(&slave_config);
// slave_config.ss_pin = CONF_WINC_SPI_CS_PIN;
// spi_attach_slave(&slave_inst, &slave_config);
// /* Configure the SPI master. */
// spi_get_config_defaults(&config);
// config.mux_setting = CONF_WINC_SPI_SERCOM_MUX;
// config.pinmux_pad0 = CONF_WINC_SPI_PINMUX_PAD0;
// config.pinmux_pad1 = CONF_WINC_SPI_PINMUX_PAD1;
// config.pinmux_pad2 = CONF_WINC_SPI_PINMUX_PAD2;
// config.pinmux_pad3 = CONF_WINC_SPI_PINMUX_PAD3;
// config.master_slave_select_enable = false;
// config.mode_specific.master.baudrate = CONF_WINC_SPI_CLOCK;
// if (spi_init(&master, CONF_WINC_SPI_MODULE, &config) != STATUS_OK) {
// return M2M_ERR_BUS_FAIL;
// }
// /* Enable the SPI master. */
// spi_enable(&master);
nm_bsp_reset();
nm_bsp_sleep(1);
#endif
return result;
}
void HardWire::begin(uint8 self_addr) {
i2c_master_enable(sel_hard, dev_flags);
}
/**
* @brief Initialize an I2C device as slave (and master)
* @param dev Device to enable
* @param flags Bitwise or of the following I2C options:
* I2C_FAST_MODE: 400 khz operation,
* I2C_DUTY_16_9: 16/9 Tlow/Thigh duty cycle (only applicable for
* fast mode),
* I2C_BUS_RESET: Reset the bus and clock out any hung slaves on
* initialization,
* I2C_10BIT_ADDRESSING: Enable 10-bit addressing,
* I2C_REMAP: (deprecated, STM32F1 only) Remap I2C1 to SCL/PB8
* SDA/PB9.
* I2C_SLAVE_DUAL_ADDRESS: Slave can respond on 2 i2C addresses
* I2C_SLAVE_GENERAL_CALL: SLA+W broadcast to all general call
* listeners on bus. Addr 0x00
* I2C_SLAVE_USE_RX_BUFFER: Use a buffer to receive the incoming
* data. Callback at end of recv
* I2C_SLAVE_USE_TX_BUFFER: Use a buffer to transmit data.
* Callback will be called before tx
*/
void i2c_slave_enable(i2c_dev *dev, uint32 flags) {
i2c_disable(dev);
i2c_master_enable(dev, dev->config_flags | flags);
}
void TwoWire::begin(uint8_t self_addr) {
if (!_init) {
i2c_master_enable(sel_hard, dev_flags);
_init = true;
}
}
/**
* \internal
* \brief Test for I2C master transfer.
*
* First test transfer function with stop.
* write to slave, read from slave and then compare the data.
* the slave send out the data it received,
* so master write and read data should be the same.
*
* Then test transfer function without stop.
* write to slave, then use i2c_master_send_stop to complete writing,
* read from slave, compare the data.
* finally, use function with stop to complete the transfer.
*
* \param test Current test case.
*/
static void run_i2c_master_transfer_test(const struct test_case *test)
{
uint32_t timeout_cycles = 1000;
uint32_t i;
bool status = true;
uint8_t read_buffer[DATA_LENGTH] = {0};
struct i2c_master_packet packet = {
.address = SLAVE_ADDRESS,
.data_length = DATA_LENGTH,
.data = write_buffer,
.ten_bit_address = false,
.high_speed = false,
.hs_master_code = 0x0,
};
/* with stop function: master transfer test */
/* wait the master write to complete */
do {
timeout_cycles--;
if (i2c_master_write_packet_wait(&i2c_master_instance, &packet) ==
STATUS_OK) {
break;
}
} while (timeout_cycles > 0);
test_assert_true(test, timeout_cycles > 0,
"i2c master write failed");
/* wait the master read to complete */
packet.data = read_buffer;
timeout_cycles = 1000;
do {
timeout_cycles--;
if (i2c_master_read_packet_wait(&i2c_master_instance, &packet) ==
STATUS_OK) {
break;
}
} while (timeout_cycles > 0);
test_assert_true(test, timeout_cycles > 0,
"i2c master read failed");
/* Compare the sent and the received */
for (i = 0; i < DATA_LENGTH; i++) {
if (read_buffer[i] != write_buffer[i]) {
status = false;
break;
}
}
test_assert_true(test, status == true,
"i2c master transfer comparsion failed");
/* with stop function master transfer test end */
/* without stop function: master transfer test*/
/* wait the master write to finish */
packet.data = write_buffer;
timeout_cycles = 1000;
do {
timeout_cycles--;
if (i2c_master_write_packet_wait_no_stop(&i2c_master_instance, &packet) ==
STATUS_OK) {
break;
}
} while (timeout_cycles > 0);
test_assert_true(test, timeout_cycles > 0,
"i2c master write without stop failed");
/* use i2c_master_send_stop to complete master writing */
i2c_master_send_stop(&i2c_master_instance);
/* wait the master read to finish */
packet.data = read_buffer;
timeout_cycles = 1000;
do {
timeout_cycles--;
if (i2c_master_read_packet_wait_no_stop(&i2c_master_instance, &packet) ==
STATUS_OK) {
break;
}
} while (timeout_cycles > 0);
test_assert_true(test, timeout_cycles > 0,
"i2c master read without stop failed");
/* Compare the sent and the received */
for (i = 0; i < DATA_LENGTH; i++) {
if (read_buffer[i] != write_buffer[i]) {
status = false;
break;
}
}
test_assert_true(test, status == true,
"i2c master transfer without stop comparsion failed");
/* use i2c_master_write_packet_wait to complete the transfer */
packet.data = write_buffer;
do {
timeout_cycles--;
if (i2c_master_write_packet_wait(&i2c_master_instance, &packet) ==
STATUS_OK) {
break;
}
} while (timeout_cycles > 0);
test_assert_true(test, timeout_cycles > 0,
"i2c master write with repeated start failed");
/* without stop function: master transfer test end*/
}
/**
* \internal
* \brief Test full speed mode master transfer.
*
* test function with stop in full speed mode.
* \param test Current test case.
*/
static void run_i2c_full_speed_test(const struct test_case *test)
{
enum status_code status;
struct i2c_master_config config_i2c_master;
/* init i2c master in full speed mode*/
i2c_master_get_config_defaults(&config_i2c_master);
config_i2c_master.buffer_timeout = 10000;
config_i2c_master.baud_rate = I2C_MASTER_BAUD_RATE_400KHZ;
i2c_master_disable(&i2c_master_instance);
status = i2c_master_init(&i2c_master_instance, SERCOM2, &config_i2c_master);
/* Check for successful initialization */
test_assert_true(test, status == STATUS_OK,
"I2C master fast-mode initialization failed");
i2c_master_enable(&i2c_master_instance);
uint32_t timeout_cycles = 1000;
uint32_t i;
bool status1 = true;
struct i2c_master_packet packet = {
.address = SLAVE_ADDRESS,
.data_length = DATA_LENGTH,
.data = write_buffer,
.ten_bit_address = false,
.high_speed = false,
.hs_master_code = 0x0,
};
uint8_t read_buffer[DATA_LENGTH] = {0};
/* wait master write complete */
do {
timeout_cycles--;
if (i2c_master_write_packet_wait(&i2c_master_instance, &packet) ==
STATUS_OK) {
break;
}
} while (timeout_cycles > 0);
test_assert_true(test, timeout_cycles > 0,
"i2c master write failed");
/* wait master read complete */
packet.data = read_buffer;
timeout_cycles = 1000;
do {
timeout_cycles--;
if (i2c_master_read_packet_wait(&i2c_master_instance, &packet) ==
STATUS_OK) {
break;
}
} while (timeout_cycles > 0);
test_assert_true(test, timeout_cycles > 0,
"i2c master read failed");
/* Compare the sent and the received */
for (i = 0; i < DATA_LENGTH; i++) {
if (read_buffer[i] != write_buffer[i]) {
status1 = false;
break;
}
}
test_assert_true(test, status1 == true,
"i2c master transfer comparsion failed");
}
/**
* \brief Run I2C master unit tests
*
* Initializes the system and serial output, then sets up the
* I2C master unit test suite and runs it.
*/
int main(void)
{
system_init();
cdc_uart_init();
/* Define Test Cases */
DEFINE_TEST_CASE(i2c_init_test,
NULL,
run_i2c_init_test,
NULL,
"Testing I2C Initialization");
DEFINE_TEST_CASE(i2c_master_transfer_test,
NULL,
run_i2c_master_transfer_test,
NULL,
"Testing I2C master data transfer");
DEFINE_TEST_CASE(i2c_full_speed_test,
NULL,
run_i2c_full_speed_test,
NULL,
"Testing I2C change speed transfer");
/* Put test case addresses in an array */
DEFINE_TEST_ARRAY(i2c_tests) = {
&i2c_init_test,
&i2c_master_transfer_test,
&i2c_full_speed_test,
};
/* Define the test suite */
DEFINE_TEST_SUITE(i2c_test_suite, i2c_tests,
"SAM I2C driver test suite");
/* Run all tests in the suite*/
test_suite_run(&i2c_test_suite);
while (true) {
/* Intentionally left empty */
}
}
void cap_init(void) {
// 63 2 4 1 63 2 4 1 0 8 4
cap_set_mhd_r(63);
cap_set_nhd_r(2);
cap_set_ncl_r(4);
cap_set_fdl_r(1);
cap_set_mhd_f(63);
cap_set_nhd_f(2);
cap_set_ncl_r(4);
cap_set_fdl_f(1);
cap_set_dbr(0);
cap_set_touch_threshold(8);
cap_set_release_threshold(4);
/**
gpio_set_mode(PIN_MAP[BOARD_I2C_SDA].gpio_device, PIN_MAP[BOARD_I2C_SDA].gpio_bit, GPIO_OUTPUT_PP);
gpio_set_mode(PIN_MAP[BOARD_I2C_SCL].gpio_device, PIN_MAP[BOARD_I2C_SCL].gpio_bit, GPIO_OUTPUT_PP);
gpio_write_bit(PIN_MAP[BOARD_I2C_SDA].gpio_device, PIN_MAP[BOARD_I2C_SDA].gpio_bit, 1);
gpio_write_bit(PIN_MAP[BOARD_I2C_SCL].gpio_device, PIN_MAP[BOARD_I2C_SCL].gpio_bit, 1);
delay_us(1000);
gpio_set_mode(PIN_MAP[BOARD_I2C_SDA].gpio_device, PIN_MAP[BOARD_I2C_SDA].gpio_bit, GPIO_INPUT_PD); // Can also be floating, but PD is safer if components misplaced.
gpio_set_mode(PIN_MAP[BOARD_I2C_SCL].gpio_device, PIN_MAP[BOARD_I2C_SCL].gpio_bit, GPIO_INPUT_PD);
*/
i2c = CAPTOUCH_I2C;
i2c_init(i2c);
i2c_master_enable(i2c, I2C_BUS_RESET);
mpr121Write(0x80, 0x63); // soft reset
delay_us(1000);
mpr121Write(ELE_CFG, 0x00); // disable electrodes for config
delay_us(100);
// Section A and B - R (rise) F (fall) T (touch)
mpr121Write(MHD_R, cap_mhd_r); // (1 to 63)
mpr121Write(NHD_R, cap_nhd_r); // (1 to 63)
mpr121Write(NCL_R, cap_ncl_r); // (0 to 255)
mpr121Write(FDL_R, cap_fdl_r); // (0 to 255)
mpr121Write(MHD_F, cap_mhd_f); // (1 to 63) largest value to pass through filer
mpr121Write(NHD_F, cap_nhd_f); // (1 to 63) maximum change allowed
mpr121Write(NCL_F, cap_ncl_f); // (0 to 255) number of samples required to determine non-noise
mpr121Write(FDL_F, cap_fdl_f); // (0 to 255) rate of filter operation, larger = slower.
// Section D
// Set the Filter Configuration
// Set ESI2
// was 0x01, 0x25
mpr121Write(AFE_CONF, 0x01); //AFE_CONF 0x5C
mpr121Write(FIL_CFG, 0x04); //FIL_CFG 0x5D
// Section F
mpr121Write(ATO_CFG0, 0x0B); // ATO_CFG0 0x7B
// limits
// was0xFF,0x00,0x0E
mpr121Write(ATO_CFGU, 0x9C); // ATO_CFGU 0x7D
mpr121Write(ATO_CFGL, 0x65); // ATO_CFGL 0x7E
mpr121Write(ATO_CFGT, 0x8C); // ATO_CFGT 0x7F
// enable debouncing
mpr121Write(DBR, cap_dbr); // set debouncing, in this case 7 for both touch and release.
// Section C
// This group sets touch and release thresholds for each electrode
mpr121Write(ELE0_T, cap_touch_threshold);
mpr121Write(ELE0_R, cap_release_threshold);
mpr121Write(ELE1_T, cap_touch_threshold);
mpr121Write(ELE1_R, cap_release_threshold);
mpr121Write(ELE2_T, cap_touch_threshold);
mpr121Write(ELE2_R, cap_release_threshold);
mpr121Write(ELE3_T, cap_touch_threshold);
mpr121Write(ELE3_R, cap_release_threshold);
mpr121Write(ELE4_T, cap_touch_threshold);
mpr121Write(ELE4_R, cap_release_threshold);
mpr121Write(ELE5_T, cap_touch_threshold);
mpr121Write(ELE5_R, cap_release_threshold);
mpr121Write(ELE6_T, cap_touch_threshold);
mpr121Write(ELE6_R, cap_release_threshold);
mpr121Write(ELE7_T, cap_touch_threshold);
mpr121Write(ELE7_R, cap_release_threshold);
mpr121Write(ELE8_T, cap_touch_threshold);
mpr121Write(ELE8_R, cap_release_threshold);
mpr121Write(ELE9_T, cap_touch_threshold);
mpr121Write(ELE9_R, cap_release_threshold);
mpr121Write(ELE10_T, cap_touch_threshold);
mpr121Write(ELE10_R, cap_release_threshold);
mpr121Write(ELE11_T, cap_touch_threshold);
mpr121Write(ELE11_R, cap_release_threshold);
delay_us(100);
// Section E
// Electrode Configuration
// Enable 6 Electrodes and set to run mode
// Set ELE_CFG to 0x00 to return to standby mode
mpr121Write(ELE_CFG, 0x0C); // Enables all 12 Electrodes
delay_us(100);
// This can also be FLOATING, but PU is safer if components misplaced.
gpio_set_mode(PIN_MAP[CAPTOUCH_GPIO].gpio_device,
PIN_MAP[CAPTOUCH_GPIO].gpio_bit, GPIO_INPUT_PU);
exti_attach_interrupt((afio_exti_num) (PIN_MAP[CAPTOUCH_GPIO].gpio_bit),
gpio_exti_port(PIN_MAP[CAPTOUCH_GPIO].gpio_device), cap_change,
EXTI_FALLING);
// Clears the first interrupt
uint32_t ts = realtime_get_unixtime();
for (int n = 0; n < 16; n++)
press_time[n] = ts;
for (int n = 0; n < 16; n++)
release_time[n] = ts;
press_time_any = ts;
release_time_any = ts;
// Set the cap_enabled flag to remember the captouch is on
cap_enabled = 1;
return;
}