Commit 9b0f1ec6 authored by schneider's avatar schneider
Browse files

feat(ips): output a 20% duty cycle on one pin

parent b470ad71
......@@ -64,6 +64,15 @@
#include "GUI_DEV/GUI_Paint.h"
#include "Fonts/fonts.h"
#include "image/image.h"
#include "tmr.h"
// Parameters for PWM output
#define PORT_PWM PORT_0 // port
#define PIN_PWM PIN_7 // pin
#define FREQ 200 // (Hz)
//#define DUTY_CYCLE 75 // (%)
#define DUTY_CYCLE 20 // (%)
#define PWM_TIMER MXC_TMR1 // must change PORT_PWM and PIN_PWM if changed
/***** Definitions *****/
......@@ -79,6 +88,56 @@ const gpio_cfg_t DEV_RST_PIN = {PORT_1, PIN_6, GPIO_FUNC_OUT, GPIO_PAD_NONE};
const gpio_cfg_t DEV_DC_PIN = {PORT_1, PIN_7, GPIO_FUNC_OUT, GPIO_PAD_NONE};
/***** Functions *****/
void PWM_Output()
{
// Declare variables
gpio_cfg_t gpio_pwm; // to configure GPIO
tmr_cfg_t tmr; // to congigure timer
tmr_pwm_cfg_t tmr_pwm; // for configure PWM
unsigned int period_ticks = PeripheralClock / FREQ;
unsigned int duty_ticks = period_ticks * DUTY_CYCLE / 100;
// Congfigure GPIO port and pin for PWM
gpio_pwm.func = GPIO_FUNC_ALT4;
gpio_pwm.port = PORT_PWM;
gpio_pwm.mask = PIN_PWM;
gpio_pwm.pad = GPIO_PAD_PULL_DOWN;
if (GPIO_Config(&gpio_pwm) != E_NO_ERROR) {
printf("Failed GPIO_Config for pwm.\n");
}
/*
Steps for configuring a timer for PWM mode:
1. Disable the timer
2. Set the prescale value
3. Configure the timer for PWM mode
4. Set polarity, pwm parameters
5. Enable Timer
*/
TMR_Disable(PWM_TIMER);
TMR_Init(PWM_TIMER, TMR_PRES_1, 0);
tmr.mode = TMR_MODE_PWM;
tmr.cmp_cnt = period_ticks;
tmr.pol = 0;
TMR_Config(PWM_TIMER, &tmr);
tmr_pwm.pol = 1;
tmr_pwm.per_cnt = period_ticks;
tmr_pwm.duty_cnt = duty_ticks;
if (TMR_PWMConfig(PWM_TIMER, &tmr_pwm) != E_NO_ERROR) {
printf("Failed TMR_PWMConfig.\n");
}
TMR_Enable(PWM_TIMER);
printf("PWM started.\n");
}
// *****************************************************************************
int main(void)
......@@ -118,12 +177,13 @@ int main(void)
GPIO_Config(&DEV_RST_PIN);
GPIO_Config(&DEV_DC_PIN);
PWM_Output();
LCD_SetBacklight(500);
LCD_Init();
LCD_Clear(BLACK);
Paint_NewImage(LCD_WIDTH, LCD_HEIGHT,0,WHITE);
Paint_Clear(WHITE);
Paint_Clear(BLACK);
//Paint_SetRotate(180);
Paint_DrawString_EN(0, 0, "123", &Font24, 0x000f, 0xfff0);
Paint_DrawString_EN(0, 23, "ABC", &Font24, BLUE, CYAN);
......@@ -134,7 +194,7 @@ int main(void)
Paint_DrawCircle(85,25, 22, GREEN, DRAW_FILL_EMPTY, DOT_PIXEL_2X2);
Paint_DrawImage(gImage_40X40,120, 0,40, 40);
DEV_Delay_ms(2000);
DEV_Delay_ms(10000);
Paint_DrawImage(gImage_160X80,0, 0, 160, 80);
while (1) {
......
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