How can i initialise all four channel of pwm1 using pwm library. i need to initialise one channel for one purpose and other channel for different purpose. whenever i am trying to initialise it is showing error what shou;d be the correct way
what are the necessory changes in PWM library example
Hi,
What error code do you get?
it is showing redefinition of pwm1 timer
in example we have only used two channel of pwm1
so how can we use remaining two channnels
Are you using the PWM driver or PWM library ? Could you upload your project here?
#include <stdio.h> #include "boards.h" #include "app_uart.h" #include "app_error.h" #include <nrf_delay.h> #include "app_mpu.h" #include <stdbool.h> #include <stdint.h> #include "nrf.h" #include "bsp.h" #include "app_pwm.h"
/*UART buffer size. */
#define UART_TX_BUF_SIZE 256
#define UART_RX_BUF_SIZE 1
/**
* @brief UART events handler.
*/
static void uart_events_handler(app_uart_evt_t * p_event)
{
switch (p_event->evt_type)
{
case APP_UART_COMMUNICATION_ERROR:
APP_ERROR_HANDLER(p_event->data.error_communication);
break;
case APP_UART_FIFO_ERROR:
APP_ERROR_HANDLER(p_event->data.error_code);
break;
default:
break;
}
}
/**
* @brief UART initialization.
* Just the usual way. Nothing special here
*/
static void uart_config(void)
{
uint32_t err_code;
const app_uart_comm_params_t comm_params =
{
RX_PIN_NUMBER,
TX_PIN_NUMBER,
RTS_PIN_NUMBER,
CTS_PIN_NUMBER,
APP_UART_FLOW_CONTROL_DISABLED,
false,
UART_BAUDRATE_BAUDRATE_Baud115200
};
APP_UART_FIFO_INIT(&comm_params,
UART_RX_BUF_SIZE,
UART_TX_BUF_SIZE,
uart_events_handler,
APP_IRQ_PRIORITY_LOW,
err_code);
APP_ERROR_CHECK(err_code);
}
void mpu_setup(void)
{
ret_code_t ret_code;
// Initiate MPU driver
ret_code = mpu_init();
APP_ERROR_CHECK(ret_code); // Check for errors in return value
// Setup and configure the MPU with intial values
mpu_config_t p_mpu_config = MPU_DEFAULT_CONFIG(); // Load default values
p_mpu_config.smplrt_div = 19; // Change sampelrate. Sample Rate = Gyroscope Output Rate / (1 + SMPLRT_DIV). 19 gives a sample rate of 50Hz
p_mpu_config.accel_config.afs_sel = AFS_2G; // Set accelerometer full scale range to 2G
ret_code = mpu_config(&p_mpu_config); // Configure the MPU with above values
APP_ERROR_CHECK(ret_code); // Check for errors in return value
}
APP_PWM_INSTANCE(PWM1,1); // Create the instance "PWM1" using TIMER1.
static volatile bool ready_flag; // A flag indicating PWM status.
void pwm_ready_callback(uint32_t pwm_id) // PWM callback function
{
ready_flag = true;
}
/**
* @brief Function for main application entry.
*/
int main(void)
{
uint32_t err_code;
LEDS_CONFIGURE(LEDS_MASK);
LEDS_OFF(LEDS_MASK);
uart_config();
printf("\nRiosh Technologies\n");
//ret_code_t err_code;
/* 2-channel PWM, 200Hz, output on DK LED pins. */
app_pwm_config_t pwm1_cfg = APP_PWM_DEFAULT_CONFIG_2CH(5000L, BSP_LED_2 , BSP_LED_3);
/* Switch the polarity of the second channel. */
pwm1_cfg.pin_polarity[1] = APP_PWM_POLARITY_ACTIVE_HIGH;
/* Initialize and enable PWM. */
err_code = app_pwm_init(&PWM1,&pwm1_cfg,pwm_ready_callback);
APP_ERROR_CHECK(err_code);
app_pwm_enable(&PWM1);
uint32_t value;
mpu_setup();
accel_values_t acc_values;
uint32_t sample_number = 0;
while(1)
{
// Read accelerometer sensor values
err_code = mpu_read_accel(&acc_values);
APP_ERROR_CHECK(err_code);
// Clear terminal and print values
printf("\033[3;1HSample # %d\r\nX: %06d\r\nY: %06d\r\nZ: %06d", ++sample_number, acc_values.x, acc_values.y, acc_values.z);
// nrf_gpio_pin_toggle(LED_1);
nrf_delay_ms(250);
if(acc_values.x > 10000)
{
for (uint8_t i = 0; i < 40; ++i)
{
value = (i < 20) ? (i * 5) : (100 - (i - 20) * 5);
ready_flag = false;
/* Set the duty cycle - keep trying until PWM is ready... */
while (app_pwm_channel_duty_set(&PWM1, 0, value) == NRF_ERROR_BUSY);
/* ... or wait for callback. */
while(!ready_flag);
APP_ERROR_CHECK(app_pwm_channel_duty_set(&PWM1, 1, value));
nrf_delay_ms(25);
}
}
}
}