Initial commit: LSPi (LiangShanPi) project
GD32F470ZGT6 based project with full peripheral support: - SDRAM (W9825G6KH) via EXMC - LCD NT35510 (480x800) via EXMC NOR/PSRAM - Flash (W25Q64) via SPI - UART (USART0) debug console - LED indicators - CMSIS-DAP debug interface - CMake + ARM GCC toolchain build system
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#include "timer_driver.h"
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#include "gd32f4xx.h"
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#include <cstddef>
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struct timer_hw_config_t {
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uint32_t timer_periph;
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rcu_periph_enum rcu_clock;
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bool is_32bit;
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bool is_advanced;
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};
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static constexpr timer_hw_config_t timer_hw_map[] = {
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{TIMER0, RCU_TIMER0, false, true },
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{TIMER1, RCU_TIMER1, true, false},
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{TIMER2, RCU_TIMER2, false, false},
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{TIMER3, RCU_TIMER3, false, false},
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{TIMER4, RCU_TIMER4, true, false},
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{TIMER5, RCU_TIMER5, false, false},
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{TIMER6, RCU_TIMER6, false, false},
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{TIMER7, RCU_TIMER7, false, true },
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{TIMER8, RCU_TIMER8, false, false},
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{TIMER9, RCU_TIMER9, false, false},
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{TIMER10, RCU_TIMER10, false, false},
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{TIMER11, RCU_TIMER11, false, false},
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{TIMER12, RCU_TIMER12, false, false},
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{TIMER13, RCU_TIMER13, false, false},
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};
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static uint8_t timer_irq_map(uint32_t timer_periph)
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{
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if (timer_periph == TIMER0) return TIMER0_UP_TIMER9_IRQn;
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if (timer_periph == TIMER1) return TIMER1_IRQn;
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if (timer_periph == TIMER2) return TIMER2_IRQn;
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if (timer_periph == TIMER3) return TIMER3_IRQn;
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if (timer_periph == TIMER4) return TIMER4_IRQn;
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if (timer_periph == TIMER5) return 0;
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if (timer_periph == TIMER6) return TIMER6_IRQn;
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if (timer_periph == TIMER7) return TIMER7_UP_TIMER12_IRQn;
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if (timer_periph == TIMER8) return TIMER0_BRK_TIMER8_IRQn;
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if (timer_periph == TIMER9) return TIMER0_UP_TIMER9_IRQn;
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if (timer_periph == TIMER10) return TIMER0_TRG_CMT_TIMER10_IRQn;
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if (timer_periph == TIMER11) return TIMER7_BRK_TIMER11_IRQn;
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if (timer_periph == TIMER12) return TIMER7_UP_TIMER12_IRQn;
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if (timer_periph == TIMER13) return TIMER7_TRG_CMT_TIMER13_IRQn;
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return 0;
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}
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TimerBus::TimerBus(TimerPort port)
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: port_(port)
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{
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}
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TimerBus::~TimerBus()
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{
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if (initialized_) {
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deinit();
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}
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}
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RetCode TimerBus::init(const TimerConfig &config)
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{
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uint8_t port_idx = static_cast<uint8_t>(port_);
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if (port_idx >= sizeof(timer_hw_map) / sizeof(timer_hw_map[0])) {
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return RET_INVALID_PARAM;
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}
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const timer_hw_config_t &hw = timer_hw_map[port_idx];
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if (hw.timer_periph == 0) {
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return RET_NOT_SUPPORTED;
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}
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config_ = config;
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rcu_periph_clock_enable(hw.rcu_clock);
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timer_parameter_struct timer_para;
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timer_struct_para_init(&timer_para);
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timer_para.prescaler = static_cast<uint16_t>(config.prescaler - 1);
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timer_para.period = config.period;
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timer_para.alignedmode = TIMER_COUNTER_EDGE;
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timer_para.counterdirection = TIMER_COUNTER_UP;
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timer_para.clockdivision = TIMER_CKDIV_DIV1;
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timer_para.repetitioncounter = 0U;
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timer_init(hw.timer_periph, &timer_para);
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if (config.mode == TimerMode::ONE_PULSE) {
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timer_single_pulse_mode_config(hw.timer_periph, TIMER_SP_MODE_SINGLE);
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}
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if (config.use_interrupt) {
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uint8_t irq = timer_irq_map(hw.timer_periph);
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if (irq != 0) {
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timer_interrupt_enable(hw.timer_periph, TIMER_INT_UP);
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nvic_irq_enable(irq, 0, 0);
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}
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}
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initialized_ = true;
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return RET_OK;
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}
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RetCode TimerBus::deinit()
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{
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uint8_t port_idx = static_cast<uint8_t>(port_);
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if (port_idx >= sizeof(timer_hw_map) / sizeof(timer_hw_map[0])) {
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return RET_INVALID_PARAM;
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}
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const timer_hw_config_t &hw = timer_hw_map[port_idx];
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timer_disable(hw.timer_periph);
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timer_interrupt_disable(hw.timer_periph, TIMER_INT_UP);
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timer_deinit(hw.timer_periph);
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rcu_periph_clock_disable(hw.rcu_clock);
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initialized_ = false;
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return RET_OK;
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}
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RetCode TimerBus::start()
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{
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uint8_t port_idx = static_cast<uint8_t>(port_);
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if (port_idx >= sizeof(timer_hw_map) / sizeof(timer_hw_map[0])) {
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return RET_INVALID_PARAM;
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}
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if (!initialized_) return RET_NOT_INITIALIZED;
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const timer_hw_config_t &hw = timer_hw_map[port_idx];
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timer_enable(hw.timer_periph);
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return RET_OK;
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}
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RetCode TimerBus::stop()
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{
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uint8_t port_idx = static_cast<uint8_t>(port_);
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if (port_idx >= sizeof(timer_hw_map) / sizeof(timer_hw_map[0])) {
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return RET_INVALID_PARAM;
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}
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if (!initialized_) return RET_NOT_INITIALIZED;
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const timer_hw_config_t &hw = timer_hw_map[port_idx];
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timer_disable(hw.timer_periph);
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return RET_OK;
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}
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RetCode TimerBus::set_period(uint32_t period)
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{
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uint8_t port_idx = static_cast<uint8_t>(port_);
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if (port_idx >= sizeof(timer_hw_map) / sizeof(timer_hw_map[0])) {
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return RET_INVALID_PARAM;
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}
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if (!initialized_) return RET_NOT_INITIALIZED;
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const timer_hw_config_t &hw = timer_hw_map[port_idx];
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timer_autoreload_value_config(hw.timer_periph, period);
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config_.period = period;
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return RET_OK;
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}
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uint32_t TimerBus::get_counter() const
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{
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uint8_t port_idx = static_cast<uint8_t>(port_);
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if (port_idx >= sizeof(timer_hw_map) / sizeof(timer_hw_map[0])) {
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return 0;
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}
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if (!initialized_) return 0;
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const timer_hw_config_t &hw = timer_hw_map[port_idx];
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return timer_counter_read(hw.timer_periph);
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}
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void timer_irq_handler(TimerPort port)
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{
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uint8_t port_idx = static_cast<uint8_t>(port);
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if (port_idx >= sizeof(timer_hw_map) / sizeof(timer_hw_map[0])) {
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return;
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}
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const timer_hw_config_t &hw = timer_hw_map[port_idx];
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if (hw.timer_periph == 0) return;
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if (timer_interrupt_flag_get(hw.timer_periph, TIMER_INT_UP) != RESET) {
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timer_interrupt_flag_clear(hw.timer_periph, TIMER_INT_UP);
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}
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}
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extern "C" {
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static TimerBus timer_0(TimerPort::_0);
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static TimerBus timer_1(TimerPort::_1);
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static TimerBus timer_2(TimerPort::_2);
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static TimerBus timer_3(TimerPort::_3);
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static TimerBus timer_4(TimerPort::_4);
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static TimerBus timer_5(TimerPort::_5);
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static TimerBus timer_6(TimerPort::_6);
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static TimerBus timer_7(TimerPort::_7);
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static TimerBus timer_8(TimerPort::_8);
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static TimerBus timer_9(TimerPort::_9);
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static TimerBus timer_10(TimerPort::_10);
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static TimerBus timer_11(TimerPort::_11);
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static TimerBus timer_12(TimerPort::_12);
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static TimerBus timer_13(TimerPort::_13);
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static TimerBus *timer_instances[] = {
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&timer_0, &timer_1, &timer_2, &timer_3, &timer_4, &timer_5, &timer_6,
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&timer_7, &timer_8, &timer_9, &timer_10, &timer_11, &timer_12, &timer_13,
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};
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static uint8_t timer_inited[14] = {0};
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int timer_bus_init(uint8_t port, uint32_t prescaler, uint32_t period)
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{
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if (port >= 14) return -1;
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TimerConfig cfg;
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cfg.prescaler = prescaler;
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cfg.period = period;
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RetCode ret = timer_instances[port]->init(cfg);
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timer_inited[port] = (ret == RET_OK) ? 1 : 0;
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return timer_inited[port] ? 0 : -1;
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}
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int timer_start(uint8_t port)
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{
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if (port >= 14 || !timer_inited[port]) return -1;
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return timer_instances[port]->start() == RET_OK ? 0 : -1;
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}
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int timer_stop(uint8_t port)
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{
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if (port >= 14 || !timer_inited[port]) return -1;
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return timer_instances[port]->stop() == RET_OK ? 0 : -1;
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}
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} /* extern "C" */
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