十七从0开始卷出一个新项目之瑞萨RZN2L定时器GPTDMA生成PWM的运动控制
目录
十七、从0开始卷出一个新项目之瑞萨RZN2L定时器(GPT)+DMA生成PWM的运动控制
一、概述
分享瑞萨RZN2L使用DMA生成PWM的运动控制的例程源码
rzn2l必要的外设资源：
rzn2l拥有32-bit timer General PWM Timer (GPT) with 18 channels
CPU、GPT最高频率400Mhz
DMAC0 and DMAC1 8 channels + 8 channels
还有cmt、cmtw、mtu3等其他定时器
ESC控制器
二、工程源码
__asm volatile ("cpsie i");
g_timer0.p_api->open(g_timer0.p_ctrl, g_timer0.p_cfg);
g_timer0.p_api->enable(g_timer0.p_ctrl);
g_timer0.p_api->start(g_timer0.p_ctrl);
g_transfer0.p_api->open(g_transfer0.p_ctrl, g_transfer0.p_cfg);
g_transfer0_ctrl.p_cfg->p_info->p_src = (void*)&buf_left[0];
g_transfer0_ctrl.p_cfg->p_info->p_dest = (void*)&g_timer0_ctrl.p_reg->GTPBR;//(void*)&buf_des[0];//(void*)&g_timer0_ctrl.p_reg->GTPBR;
g_transfer0_ctrl.p_cfg->p_info->length = 40;
g_transfer0.p_api->reconfigure(g_transfer0.p_ctrl, g_transfer0_ctrl.p_cfg->p_info);
g_transfer0.p_api->enable(g_transfer0.p_ctrl);
g_transfer0.p_api->softwareStart(g_transfer0.p_ctrl, (transfer_start_mode_t)0);三、测试效果
四、总结
- rzn2l具备实现运动控制的重要资源，可实现1Mhz的效果
- 例程仅提供GPT+DMA的使用
