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Commit 57491331 authored by Projects's avatar Projects
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lcd: EXTCOMIN signal is directly controlled by a timer.

parent 273f41f9
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Showing with 50 additions and 33 deletions
sw/common/drivers/lcd.c
View file @ 57491331
......@@ -28,6 +28,7 @@
#include <em_cmu.h>
#include <em_usart.h>
#include <em_rtc.h>
#include <em_timer.h>
#include <udelay.h>
// Enable 90* rotation
......@@ -94,38 +95,53 @@ static void timer_delay(uint16_t usecs)
UDELAY_Delay(usecs);
}
static void rtc_setup(unsigned int frequency)
static void extcomin_setup(unsigned int frequency)
{
RTC_Init_TypeDef rtc_init = RTC_INIT_DEFAULT;
CMU_ClockEnable(cmuClock_TIMER0, true);
// Enable LE domain registers
if(!(CMU->HFCORECLKEN0 & CMU_HFCORECLKEN0_LE))
CMU_ClockEnable(cmuClock_CORELE, true);
if(cmuSelect_LFXO != CMU_ClockSelectGet(cmuClock_LFA))
CMU_ClockSelectSet(cmuClock_LFA, cmuSelect_LFXO);
CMU_ClockDivSet(cmuClock_RTC, cmuClkDiv_2);
CMU_ClockEnable(cmuClock_RTC, true);
// Initialize RTC
rtc_init.enable = false; // Do not start RTC after initialization is complete
rtc_init.debugRun = false; // Halt RTC when debugging
rtc_init.comp0Top = true; // Wrap around on COMP0 match
RTC_Init(&rtc_init);
RTC_CompareSet(0, (CMU_ClockFreqGet(cmuClock_RTC) / frequency) - 1);
NVIC_EnableIRQ(RTC_IRQn);
RTC_IntEnable(RTC_IEN_COMP0);
RTC_Enable(true);
}
void RTC_IRQHandler(void)
{
RTC_IntClear(RTC_IF_COMP0);
GPIO_PinOutToggle(LCD_PORT_EXTCOMIN, LCD_PIN_EXTCOMIN);
// Select CC channel parameters
TIMER_InitCC_TypeDef timerCCInit =
{
.cufoa = timerOutputActionNone,
.cofoa = timerOutputActionToggle,
.cmoa = timerOutputActionNone,
.mode = timerCCModeCompare,
.filter = false,
.prsInput = false,
.coist = false,
.outInvert = false,
};
// Configure CC channel
TIMER_InitCC(TIMER0, 2, &timerCCInit);
// Route CC2 to location 1 (PE12) and enable pin
TIMER0->ROUTE |= (TIMER_ROUTE_CC2PEN | TIMER_ROUTE_LOCATION_LOC0);
// Set compare value starting at 0 - it will be incremented in the interrupt handler
TIMER_CompareBufSet(TIMER0, 2, 0);
// Set Top Value
TIMER_TopSet(TIMER0, (CMU_ClockFreqGet(cmuClock_HFPER) / 16)/ frequency);
// Select timer parameters
TIMER_Init_TypeDef timerInit =
{
.enable = true,
.debugRun = true,
.prescale = timerPrescale8,
.clkSel = timerClkSelHFPerClk,
.fallAction = timerInputActionNone,
.riseAction = timerInputActionNone,
.mode = timerModeUp,
.dmaClrAct = false,
.quadModeX4 = false,
.oneShot = false,
.sync = false,
};
// Configure timer
TIMER_Init(TIMER0, &timerInit);
}
void lcd_init(void)
......@@ -147,8 +163,8 @@ void lcd_init(void)
// EXTMODE is hardwired
// GPIO_PinModeSet(LCD_PORT_EXTMODE, LCD_PIN_EXTMODE, gpioModePushPull, 0);
// Setup RTC to generate interrupts at given frequency
rtc_setup(LCD_POL_INV_FREQ);
// Setup timer to generate interrupts at given frequency for EXTCOMIN pin
extcomin_setup(LCD_POL_INV_FREQ);
lcd_power(1);
......
sw/common/drivers/lcd.h
View file @ 57491331
......@@ -56,7 +56,7 @@
#define LCD_SPI_CLOCK cmuClock_USART2
#define LCD_SPI_LOCATION 0
#define LCD_SPI_BAUDRATE 500000
#define LCD_POL_INV_FREQ 64
#define LCD_POL_INV_FREQ 60
/**
* @brief LCD initialization routine.
......
sw/freertos/Makefile
View file @ 57491331
......@@ -135,6 +135,7 @@ C_SRC += \
../common/emlib/src/em_rmu.c \
../common/emlib/src/em_rtc.c \
../common/emlib/src/em_system.c \
../common/emlib/src/em_timer.c \
../common/emlib/src/em_usart.c \
../common/emdrv/sleep/src/sleep.c \
../common/drivers/lcd.c \
......
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