1 files changed, 0 insertions, 110 deletions
diff --git a/src/stm32f1/adc.c b/src/stm32f1/adc.c
deleted file mode 100644
index 47271d3e..00000000
--- a/src/stm32f1/adc.c
+++ /dev/null
@@ -1,110 +0,0 @@
-// ADC functions on STM32F1
-//
-// Copyright (C) 2018 Grigori Goronzy <greg@kinoho.net>
-//
-// This file may be distributed under the terms of the GNU GPLv3 license.
-
-#include <stdbool.h> // bool
-#include "board/io.h" // readb
-#include "command.h" // shutdown
-#include "compiler.h" // ARRAY_SIZE
-#include "gpio.h" // gpio_adc_setup
-#include "internal.h" // GPIO
-#include "stm32f1xx_ll_adc.h" // LL_ADC_REG_ReadConversionData12
-#include "stm32f1xx_ll_gpio.h" // LL_GPIO_SetPinMode
-#include "sched.h" // sched_shutdown
-
-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_41CYCLES_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);
-    }
-}