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-rw-r--r--src/stm32f1/gpio.c222
1 files changed, 5 insertions, 217 deletions
diff --git a/src/stm32f1/gpio.c b/src/stm32f1/gpio.c
index 5deb752b..e6df3888 100644
--- a/src/stm32f1/gpio.c
+++ b/src/stm32f1/gpio.c
@@ -4,34 +4,24 @@
//
// This file may be distributed under the terms of the GNU GPLv3 license.
-#include <stdint.h> // uint32_t
-#include <stdbool.h>
-#include "autoconf.h" // CONFIG_CLOCK_FREQ
+#include "board/irq.h" // irq_save
#include "command.h" // shutdown
#include "compiler.h" // ARRAY_SIZE
#include "gpio.h" // gpio_out_setup
-#include "stm32f1xx.h"
-#include "stm32f1xx_ll_rcc.h"
-#include "stm32f1xx_ll_gpio.h"
-#include "stm32f1xx_ll_adc.h"
-#include "stm32f1xx_ll_spi.h"
+#include "internal.h" // GPIO
+#include "stm32f1xx_ll_gpio.h" // LL_GPIO_SetPinMode
#include "sched.h" // sched_shutdown
-#include "board/irq.h"
-#include "board/io.h"
/****************************************************************
* Pin mappings
****************************************************************/
-#define GPIO(PORT, NUM) (((PORT)-'A') * 16 + (NUM))
-#define GPIO2PORT(PIN) ((PIN) / 16)
-
-static GPIO_TypeDef *const digital_regs[] = {
+GPIO_TypeDef *const digital_regs[] = {
GPIOA, GPIOB, GPIOC, GPIOD, GPIOE
};
-static uint32_t const digital_pins[] = {
+uint32_t const digital_pins[] = {
LL_GPIO_PIN_0,
LL_GPIO_PIN_1,
LL_GPIO_PIN_2,
@@ -136,205 +126,3 @@ gpio_in_read(struct gpio_in g)
{
return LL_GPIO_IsInputPinSet(g.regs, g.bit);
}
-
-
-/****************************************************************
- * Analog to Digital Converter (ADC) pins
- ****************************************************************/
-
-DECL_CONSTANT(ADC_MAX, 4095);
-
-#define ADC_DELAY (240 * 8)
-
-static bool adc_busy;
-static uint32_t adc_current_channel;
-
-static const uint8_t adc_pins[] = {
- GPIO('A', 0), GPIO('A', 1), GPIO('A', 2), GPIO('A', 3),
- GPIO('A', 4), GPIO('A', 5), GPIO('A', 6), GPIO('A', 7),
- GPIO('B', 0), GPIO('B', 1), GPIO('C', 0), GPIO('C', 1),
- GPIO('C', 2), GPIO('C', 3), GPIO('C', 4), GPIO('C', 5)
-};
-
-static const uint32_t adc_channels[] = {
- LL_ADC_CHANNEL_0,
- LL_ADC_CHANNEL_1,
- LL_ADC_CHANNEL_2,
- LL_ADC_CHANNEL_3,
- LL_ADC_CHANNEL_4,
- LL_ADC_CHANNEL_5,
- LL_ADC_CHANNEL_6,
- LL_ADC_CHANNEL_7,
- LL_ADC_CHANNEL_8,
- LL_ADC_CHANNEL_9,
- LL_ADC_CHANNEL_10,
- LL_ADC_CHANNEL_11,
- LL_ADC_CHANNEL_12,
- LL_ADC_CHANNEL_13,
- LL_ADC_CHANNEL_14,
- LL_ADC_CHANNEL_15,
-};
-
-struct gpio_adc
-gpio_adc_setup(uint8_t pin)
-{
- // Find pin in adc_pins table
- int chan;
- for (chan=0; ; chan++) {
- if (chan >= ARRAY_SIZE(adc_pins))
- shutdown("Not a valid ADC pin");
- if (adc_pins[chan] == pin)
- break;
- }
-
- GPIO_TypeDef *regs = digital_regs[GPIO2PORT(pin)];
- uint32_t bit = digital_pins[pin % 16];
- LL_GPIO_SetPinMode(regs, bit, LL_GPIO_MODE_ANALOG);
-
- return (struct gpio_adc){ .bit = adc_channels[chan] };
-}
-
-// Try to sample a value. Returns zero if sample ready, otherwise
-// returns the number of clock ticks the caller should wait before
-// retrying this function.
-uint32_t
-gpio_adc_sample(struct gpio_adc g)
-{
- /* ADC not busy, start conversion */
- if (!readb(&adc_busy)) {
- LL_ADC_REG_SetSequencerRanks(ADC1, LL_ADC_REG_RANK_1, g.bit);
- LL_ADC_SetChannelSamplingTime(ADC1, g.bit, LL_ADC_SAMPLINGTIME_239CYCLES_5);
- LL_ADC_REG_StartConversionSWStart(ADC1);
- adc_busy = true;
- adc_current_channel = g.bit;
- return ADC_DELAY;
- /* ADC finished conversion for this channel */
- } else if (LL_ADC_IsActiveFlag_EOS(ADC1) &&
- readl(&adc_current_channel) == g.bit) {
- LL_ADC_ClearFlag_EOS(ADC1);
- adc_busy = false;
- return 0;
- }
- /* Wants to sample another channel, or not finished yet */
- return ADC_DELAY;
-}
-
-// Read a value; use only after gpio_adc_sample() returns zero
-uint16_t
-gpio_adc_read(struct gpio_adc g)
-{
- return LL_ADC_REG_ReadConversionData12(ADC1);
-}
-
-// Cancel a sample that may have been started with gpio_adc_sample()
-void
-gpio_adc_cancel_sample(struct gpio_adc g)
-{
- if (readb(&adc_busy) && readl(&adc_current_channel) == g.bit) {
- adc_busy = false;
- LL_ADC_ClearFlag_EOS(ADC1);
- }
-}
-
-/****************************************************************
- * Serial Peripheral Interface (SPI) pins
- ****************************************************************/
-
-void spi_set_mode(SPI_TypeDef *spi, uint8_t mode)
-{
- switch (mode) {
- case 0:
- LL_SPI_SetClockPolarity(spi, LL_SPI_POLARITY_LOW);
- LL_SPI_SetClockPhase(spi, LL_SPI_PHASE_1EDGE);
- break;
- case 1:
- LL_SPI_SetClockPolarity(spi, LL_SPI_POLARITY_LOW);
- LL_SPI_SetClockPhase(spi, LL_SPI_PHASE_2EDGE);
- break;
- case 2:
- LL_SPI_SetClockPolarity(spi, LL_SPI_POLARITY_HIGH);
- LL_SPI_SetClockPhase(spi, LL_SPI_PHASE_1EDGE);
- break;
- case 3:
- LL_SPI_SetClockPolarity(spi, LL_SPI_POLARITY_HIGH);
- LL_SPI_SetClockPhase(spi, LL_SPI_PHASE_2EDGE);
- break;
- default:
- shutdown("Invalid SPI mode");
- }
-}
-
-void spi_set_baudrate(SPI_TypeDef *spi, uint32_t rate)
-{
- const uint32_t pclk = __LL_RCC_CALC_PCLK1_FREQ(SystemCoreClock, LL_RCC_GetAPB1Prescaler());
- const uint32_t prescaler = pclk / rate;
-
- uint32_t setting = LL_SPI_BAUDRATEPRESCALER_DIV256;
- if (prescaler <= 2)
- setting = LL_SPI_BAUDRATEPRESCALER_DIV2;
- else if (prescaler <= 4)
- setting = LL_SPI_BAUDRATEPRESCALER_DIV4;
- else if (prescaler <= 8)
- setting = LL_SPI_BAUDRATEPRESCALER_DIV8;
- else if (prescaler <= 16)
- setting = LL_SPI_BAUDRATEPRESCALER_DIV16;
- else if (prescaler <= 32)
- setting = LL_SPI_BAUDRATEPRESCALER_DIV32;
- else if (prescaler <= 64)
- setting = LL_SPI_BAUDRATEPRESCALER_DIV64;
- else if (prescaler <= 128)
- setting = LL_SPI_BAUDRATEPRESCALER_DIV128;
-
- LL_SPI_SetBaudRatePrescaler(spi, setting);
-}
-
-void spi_init_pins(void)
-{
- LL_GPIO_SetPinMode(GPIOB, LL_GPIO_PIN_13, LL_GPIO_MODE_ALTERNATE);
- LL_GPIO_SetPinMode(GPIOB, LL_GPIO_PIN_14, LL_GPIO_MODE_INPUT);
- LL_GPIO_SetPinMode(GPIOB, LL_GPIO_PIN_15, LL_GPIO_MODE_ALTERNATE);
- LL_GPIO_SetPinOutputType(GPIOB, LL_GPIO_PIN_13, LL_GPIO_OUTPUT_PUSHPULL);
- LL_GPIO_SetPinPull(GPIOB, LL_GPIO_PIN_14, LL_GPIO_PULL_UP);
- LL_GPIO_SetPinOutputType(GPIOB, LL_GPIO_PIN_15, LL_GPIO_OUTPUT_PUSHPULL);
-}
-
-struct spi_config
-spi_setup(uint32_t bus, uint8_t mode, uint32_t rate)
-{
- struct spi_config config;
- config.config = *SPI2;
-
- if (bus > 0 || !rate)
- shutdown("Invalid spi_setup parameters");
-
- spi_init_pins();
- spi_set_mode(&config.config, mode);
- spi_set_baudrate(&config.config, rate);
-
- return config;
-}
-
-void
-spi_prepare(struct spi_config config)
-{
- *SPI2 = config.config;
- LL_SPI_Enable(SPI2);
-}
-
-void
-spi_transfer(struct spi_config config, uint8_t receive_data,
- uint8_t len, uint8_t *data)
-{
- while (len--) {
- LL_SPI_TransmitData8(SPI2, *data);
- while (!LL_SPI_IsActiveFlag_TXE(SPI2));
- if (receive_data) {
- while (!LL_SPI_IsActiveFlag_RXNE(SPI2));
- *data = LL_SPI_ReceiveData8(SPI2);
- }
- data++;
- }
-
- while (LL_SPI_IsActiveFlag_BSY(SPI2));
- LL_SPI_Disable(SPI2);
-}
generated by cgit v1.2.3-70-g09d2 (git 2.50.1) at 2025-09-02 09:15:38 +0000