77 lines
2.4 KiB
C
77 lines
2.4 KiB
C
static u32 prd_1us = 0;
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static u32 send_cnt = 0;
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static u32 send_val = 0;
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___interrupt
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void timer5_isr(void)
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{
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JL_TIMER5->CON |= BIT(14);
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send_cnt ++;
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if (send_cnt % 2) {
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return;
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}
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u32 cnt = send_cnt / 2;
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if (cnt == 1) {
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JL_TIMER5->PRD = prd_1us * 5060;
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JL_TIMER5->PWM = prd_1us * 4500;
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JL_TIMER5->CNT = JL_TIMER5->PRD;
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} else if (cnt == 34) {
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JL_TIMER5->CON &= ~BIT(0);
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send_cnt = 0;
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return;
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} else if (send_val & BIT(33 - cnt)) {
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JL_TIMER5->PRD = prd_1us * 2240;
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JL_TIMER5->PWM = prd_1us * 1680;
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JL_TIMER5->CNT = JL_TIMER5->PRD;
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} else {
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JL_TIMER5->PRD = prd_1us * 1120;
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JL_TIMER5->PWM = prd_1us * 560;
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JL_TIMER5->CNT = JL_TIMER5->PRD;
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}
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}
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void timer5_send_ir_init(u32 port)
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{
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u32 src_clk = 12000000;
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JL_IOMAP->CON0 |= BIT(21);//timer的io输入选择内部pll_12m,不是所有的timer的io输入都可选pll,修改请看文档
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JL_TIMER5->CON = 0;
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JL_TIMER5->CON |= (0b01 << 2); //时钟源选择timer io
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JL_TIMER5->CON |= (0b0001 << 4); //时钟源4分频
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JL_TIMER5->CON |= BIT(9); //波形反向
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prd_1us = (src_clk / (4 * 1000000)); //1us的计数值
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request_irq(IRQ_TIME5_IDX, 5, timer5_isr, 0);
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if ((IO_PORTB_07 == port) || (IO_PORTA_03 == port)) {//硬件io，br25的timer5有两个硬件IO口
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gpio_set_die(port, 1);
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gpio_set_pull_up(port, 0);
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gpio_set_pull_down(port, 0);
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gpio_set_direction(port, 0);
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JL_TIMER5->CON |= BIT(8); //PWM使能
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} else {
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gpio_output_channle(port, CH2_T5_PWM_OUT); //任意IO使用outputchannel
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}
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}
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void timer5_send_ir_data(u32 ir_data)
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{
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send_val = ir_data;
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send_cnt = 0;
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JL_TIMER5->PRD = prd_1us * 9560; //设置周期 = 1us * 9605 = 9605us
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JL_TIMER5->PWM = prd_1us * 560; //设置高电平时间
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JL_TIMER5->CNT = JL_TIMER5->PRD; //计数值先给满，起一次pend后，JL_TIMER->PWM寄存器才有效
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JL_TIMER5->CON |= BIT(0); //使能timer模块
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}
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void timer5_send_ir_test(void)
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{
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/* timer5_send_ir_init(IO_PORTB_07); */
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timer5_send_ir_init(IO_PORTA_02);
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extern void wdt_clr();
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while (1) {
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wdt_clr();
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timer5_send_ir_data(0x6699aa55);
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os_time_dly(100);
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}
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}
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