Merge pull request #5648 from tannewt/rpi_pin_mux
Add full pin mux info and use it for I2C
This commit is contained in:
commit
543e4d8c4d
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@ -63,6 +63,7 @@ SRC_C += bindings/videocore/__init__.c \
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lib/tinyusb/src/portable/synopsys/dwc2/dcd_dwc2.c \
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peripherals/broadcom/caches.c \
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peripherals/broadcom/gen/interrupt_handlers.c \
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peripherals/broadcom/gen/pins.c \
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peripherals/broadcom/gpio.c \
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peripherals/broadcom/interrupts.c \
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peripherals/broadcom/mmu.c \
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@ -0,0 +1,34 @@
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/*
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* This file is part of the Micro Python project, http://micropython.org/
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*
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* The MIT License (MIT)
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*
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* Copyright (c) 2021 Scott Shawcroft for Adafruit Industries
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#pragma once
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#include "py/obj.h"
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extern const mp_obj_type_t mcu_pin_type;
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#define PIN_PREFIX_VALUES { &mcu_pin_type },
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#define PIN_PREFIX_FIELDS mp_obj_base_t base;
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@ -35,35 +35,63 @@
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#include "peripherals/broadcom/cpu.h"
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#include "peripherals/broadcom/vcmailbox.h"
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#define NUM_I2C (2)
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#if BCM_VERSION == 2711
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#define NUM_I2C (8)
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STATIC BSC0_Type *i2c[NUM_I2C] = {BSC0, BSC1, NULL, BSC3, BSC4, BSC5, BSC6, NULL};
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#else
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#define NUM_I2C (3)
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STATIC BSC0_Type *i2c[NUM_I2C] = {BSC0, BSC1, NULL};
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#endif
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STATIC bool never_reset_i2c[NUM_I2C];
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STATIC bool in_use_i2c[NUM_I2C];
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STATIC BSC0_Type *i2c[2] = {BSC0, BSC1};
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STATIC bool i2c_in_use[NUM_I2C];
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void reset_i2c(void) {
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for (size_t i = 0; i < 2; i++) {
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// BSC2 is dedicated to the first HDMI output.
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never_reset_i2c[2] = true;
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i2c_in_use[2] = true;
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#if BCM_VERSION == 2711
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// BSC7 is dedicated to the second HDMI output.
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never_reset_i2c[7] = true;
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i2c_in_use[7] = true;
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#endif
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for (size_t i = 0; i < NUM_I2C; i++) {
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if (never_reset_i2c[i]) {
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continue;
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}
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in_use_i2c[i] = false;
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i2c_in_use[i] = false;
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i2c[i]->C_b.I2CEN = false;
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COMPLETE_MEMORY_READS;
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}
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}
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void common_hal_busio_i2c_construct(busio_i2c_obj_t *self,
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const mcu_pin_obj_t *scl, const mcu_pin_obj_t *sda, uint32_t frequency, uint32_t timeout) {
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size_t instance_index = NUM_I2C;
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if ((scl == &pin_GPIO1 || scl == &pin_GPIO29 || scl == &pin_GPIO45) &&
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(sda == &pin_GPIO0 || sda == &pin_GPIO28 || sda == &pin_GPIO44)) {
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instance_index = 0;
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} else if ((scl == &pin_GPIO44 || scl == &pin_GPIO3) &&
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(sda == &pin_GPIO43 || sda == &pin_GPIO2)) {
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instance_index = 1;
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uint8_t scl_alt = 0;
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uint8_t sda_alt = 0;
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for (scl_alt = 0; scl_alt < 6; scl_alt++) {
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if (scl->functions[scl_alt].type != PIN_FUNCTION_I2C ||
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i2c_in_use[scl->functions[scl_alt].index]) {
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continue;
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}
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for (sda_alt = 0; sda_alt < 6; sda_alt++) {
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if (sda->functions[sda_alt].type != PIN_FUNCTION_I2C ||
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scl->functions[scl_alt].index != sda->functions[sda_alt].index ||
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sda->functions[sda_alt].function != I2C_FUNCTION_SDA) {
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continue;
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}
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instance_index = scl->functions[scl_alt].index;
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break;
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}
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if (instance_index != NUM_I2C) {
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break;
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}
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}
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if (instance_index == NUM_I2C) {
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mp_raise_ValueError(translate("Invalid pins"));
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}
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in_use_i2c[instance_index] = true;
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i2c_in_use[instance_index] = true;
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self->index = instance_index;
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self->peripheral = i2c[self->index];
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self->sda_pin = sda;
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@ -73,8 +101,8 @@ void common_hal_busio_i2c_construct(busio_i2c_obj_t *self,
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uint16_t clock_divider = source_clock / frequency;
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self->peripheral->DIV_b.CDIV = clock_divider;
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gpio_set_function(sda->number, GPIO_GPFSEL0_FSEL2_SDA1);
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gpio_set_function(scl->number, GPIO_GPFSEL0_FSEL3_SCL1);
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gpio_set_function(sda->number, FSEL_VALUES[sda_alt]);
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gpio_set_function(scl->number, FSEL_VALUES[scl_alt]);
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}
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bool common_hal_busio_i2c_deinited(busio_i2c_obj_t *self) {
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@ -86,6 +114,7 @@ void common_hal_busio_i2c_deinit(busio_i2c_obj_t *self) {
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return;
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}
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never_reset_i2c[self->index] = false;
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i2c_in_use[self->index] = false;
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common_hal_reset_pin(self->sda_pin);
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common_hal_reset_pin(self->scl_pin);
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@ -95,7 +124,6 @@ void common_hal_busio_i2c_deinit(busio_i2c_obj_t *self) {
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bool common_hal_busio_i2c_probe(busio_i2c_obj_t *self, uint8_t addr) {
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uint8_t result = common_hal_busio_i2c_write(self, addr, NULL, 0, true);
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// mp_printf(&mp_plat_print, "result %d %d\n", addr, result);
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return result == 0;
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}
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@ -28,14 +28,41 @@
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#include "peripherals/broadcom/gpio.h"
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STATIC bool pin_in_use[BCM_PIN_COUNT];
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STATIC bool never_reset_pin[BCM_PIN_COUNT];
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void reset_all_pins(void) {
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for (size_t i = 0; i < BCM_PIN_COUNT; i++) {
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if (never_reset_pin[i]) {
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continue;
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}
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reset_pin_number(i);
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}
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}
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void never_reset_pin_number(uint8_t pin_number) {
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never_reset_pin[pin_number] = true;
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}
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void reset_pin_number(uint8_t pin_number) {
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gpio_set_function(pin_number, 0);
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gpio_set_function(pin_number, GPIO_FUNCTION_INPUT);
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pin_in_use[pin_number] = false;
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never_reset_pin[pin_number] = false;
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// Set the pull to match the datasheet.
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BP_PULL_Enum pull = BP_PULL_NONE;
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if (pin_number < 9 ||
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(33 < pin_number && pin_number < 37) ||
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pin_number > 45) {
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pull = BP_PULL_UP;
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} else if (pin_number != 28 &&
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pin_number != 29 &&
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pin_number != 44 &&
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pin_number != 45) {
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// Most pins are pulled low so we only exclude the four pins that aren't
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// pulled at all.
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pull = BP_PULL_DOWN;
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}
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gpio_set_pull(pin_number, pull);
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}
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void common_hal_never_reset_pin(const mcu_pin_obj_t *pin) {
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@ -47,11 +74,11 @@ void common_hal_reset_pin(const mcu_pin_obj_t *pin) {
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}
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void claim_pin(const mcu_pin_obj_t *pin) {
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// Nothing to do because all changes will set the GPIO settings.
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pin_in_use[pin->number] = true;
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}
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bool pin_number_is_free(uint8_t pin_number) {
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return true;
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return !pin_in_use[pin_number];
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}
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bool common_hal_mcu_pin_is_free(const mcu_pin_obj_t *pin) {
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@ -69,71 +96,3 @@ void common_hal_mcu_pin_claim(const mcu_pin_obj_t *pin) {
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void common_hal_mcu_pin_reset_number(uint8_t pin_no) {
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reset_pin_number(pin_no);
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}
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#define PIN(num) \
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const mcu_pin_obj_t pin_GPIO##num = { \
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{ &mcu_pin_type }, \
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.number = num \
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};
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PIN(0)
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PIN(1)
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PIN(2)
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PIN(3)
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PIN(4)
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PIN(5)
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PIN(6)
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PIN(7)
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PIN(8)
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PIN(9)
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PIN(10)
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PIN(11)
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PIN(12)
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PIN(13)
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PIN(14)
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PIN(15)
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PIN(16)
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PIN(17)
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PIN(18)
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PIN(19)
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PIN(20)
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PIN(21)
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PIN(22)
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PIN(23)
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PIN(24)
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PIN(25)
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PIN(26)
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PIN(27)
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PIN(28)
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PIN(29)
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PIN(30)
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PIN(31)
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PIN(32)
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PIN(33)
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PIN(34)
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PIN(35)
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PIN(36)
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PIN(37)
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PIN(38)
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PIN(39)
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PIN(40)
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PIN(41)
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PIN(42)
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PIN(43)
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PIN(44)
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PIN(45)
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PIN(46)
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PIN(47)
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PIN(48)
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PIN(49)
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PIN(50)
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PIN(51)
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PIN(52)
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PIN(53)
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PIN(54)
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PIN(55)
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PIN(56)
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PIN(57)
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@ -32,74 +32,7 @@
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#include <py/obj.h>
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typedef struct {
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mp_obj_base_t base;
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uint8_t number;
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} mcu_pin_obj_t;
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extern const mcu_pin_obj_t pin_GPIO0;
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extern const mcu_pin_obj_t pin_GPIO1;
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extern const mcu_pin_obj_t pin_GPIO2;
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extern const mcu_pin_obj_t pin_GPIO3;
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extern const mcu_pin_obj_t pin_GPIO4;
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extern const mcu_pin_obj_t pin_GPIO5;
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extern const mcu_pin_obj_t pin_GPIO6;
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extern const mcu_pin_obj_t pin_GPIO7;
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extern const mcu_pin_obj_t pin_GPIO8;
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extern const mcu_pin_obj_t pin_GPIO9;
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extern const mcu_pin_obj_t pin_GPIO10;
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extern const mcu_pin_obj_t pin_GPIO11;
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extern const mcu_pin_obj_t pin_GPIO12;
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extern const mcu_pin_obj_t pin_GPIO13;
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extern const mcu_pin_obj_t pin_GPIO14;
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extern const mcu_pin_obj_t pin_GPIO15;
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extern const mcu_pin_obj_t pin_GPIO16;
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extern const mcu_pin_obj_t pin_GPIO17;
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extern const mcu_pin_obj_t pin_GPIO18;
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extern const mcu_pin_obj_t pin_GPIO19;
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extern const mcu_pin_obj_t pin_GPIO20;
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extern const mcu_pin_obj_t pin_GPIO21;
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extern const mcu_pin_obj_t pin_GPIO22;
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extern const mcu_pin_obj_t pin_GPIO23;
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extern const mcu_pin_obj_t pin_GPIO24;
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extern const mcu_pin_obj_t pin_GPIO25;
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extern const mcu_pin_obj_t pin_GPIO26;
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extern const mcu_pin_obj_t pin_GPIO27;
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extern const mcu_pin_obj_t pin_GPIO28;
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extern const mcu_pin_obj_t pin_GPIO29;
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extern const mcu_pin_obj_t pin_GPIO30;
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extern const mcu_pin_obj_t pin_GPIO31;
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extern const mcu_pin_obj_t pin_GPIO32;
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extern const mcu_pin_obj_t pin_GPIO33;
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extern const mcu_pin_obj_t pin_GPIO34;
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extern const mcu_pin_obj_t pin_GPIO35;
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extern const mcu_pin_obj_t pin_GPIO36;
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extern const mcu_pin_obj_t pin_GPIO37;
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extern const mcu_pin_obj_t pin_GPIO38;
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extern const mcu_pin_obj_t pin_GPIO39;
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extern const mcu_pin_obj_t pin_GPIO40;
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extern const mcu_pin_obj_t pin_GPIO41;
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extern const mcu_pin_obj_t pin_GPIO42;
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extern const mcu_pin_obj_t pin_GPIO43;
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extern const mcu_pin_obj_t pin_GPIO44;
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extern const mcu_pin_obj_t pin_GPIO45;
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extern const mcu_pin_obj_t pin_GPIO46;
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extern const mcu_pin_obj_t pin_GPIO47;
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extern const mcu_pin_obj_t pin_GPIO48;
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extern const mcu_pin_obj_t pin_GPIO49;
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extern const mcu_pin_obj_t pin_GPIO50;
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extern const mcu_pin_obj_t pin_GPIO51;
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extern const mcu_pin_obj_t pin_GPIO52;
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extern const mcu_pin_obj_t pin_GPIO53;
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extern const mcu_pin_obj_t pin_GPIO54;
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extern const mcu_pin_obj_t pin_GPIO55;
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extern const mcu_pin_obj_t pin_GPIO56;
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extern const mcu_pin_obj_t pin_GPIO57;
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#include "peripherals/broadcom/pins.h"
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void reset_all_pins(void);
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// reset_pin_number takes the pin number instead of the pointer so that objects don't
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@ -187,9 +187,11 @@ const mp_rom_map_elem_t mcu_pin_global_dict_table[TOTAL_GPIO_COUNT] = {
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PIN(51)
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PIN(52)
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PIN(53)
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#if BCM_VERSION == 2711
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PIN(54)
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PIN(55)
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PIN(56)
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PIN(57)
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#endif
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};
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MP_DEFINE_CONST_DICT(mcu_pin_globals, mcu_pin_global_dict_table);
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@ -1 +1 @@
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Subproject commit 8057af2d614c27a1e103d5f4300428f341da6bcb
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Subproject commit 2e7b56bbe941311e54fba66f0b32336bfea4388d
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