mirror of
https://github.com/espruino/Espruino.git
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85 lines
2.6 KiB
C
85 lines
2.6 KiB
C
/*
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* This file is designed to support i2c functions in Espruino,
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* a JavaScript interpreter for Microcontrollers designed by Gordon Williams
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*
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* Copyright (C) 2016 by Rhys Williams (wilberforce)
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*
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* ----------------------------------------------------------------------------
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* This file is designed to be parsed during the build process
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*
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* Contains ESP32 board specific functions.
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* ----------------------------------------------------------------------------
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*/
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#include "esp_log.h"
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#include "i2c.h"
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// Using arduino library
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#include "esp32-hal-i2c.h"
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// Let's get this working with only one device
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i2c_t * i2c=NULL;
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/** Set-up I2C master for ESP32, default pins are SCL:21, SDA:22. Only device I2C1 is supported
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* and only master mode. */
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void jshI2CSetup(IOEventFlags device, JshI2CInfo *info) {
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if (device != EV_I2C1) {
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jsError("Only I2C1 supported");
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return;
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}
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Pin scl = info->pinSCL != PIN_UNDEFINED ? info->pinSCL : 21;
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Pin sda = info->pinSDA != PIN_UNDEFINED ? info->pinSDA : 22;
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//jshPinSetState(scl, JSHPINSTATE_I2C);
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//jshPinSetState(sda, JSHPINSTATE_I2C);
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int num=1; // Master mode only 0 is slave mode..
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i2c_err_t err;
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i2c = i2cInit(num, 0, false);
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//jsError("jshI2CSetup: Frequency: %d", info->bitrate);
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err=i2cSetFrequency(i2c, (uint32_t)info->bitrate);
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if ( err != I2C_ERROR_OK ) {
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jsError( "jshI2CSetup: i2cSetFrequency error: %d", err);
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return;
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}
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err=i2cAttachSDA(i2c, pinToESP32Pin(sda));
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if ( err != I2C_ERROR_OK ) {
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jsError( "jshI2CSetup: i2cAttachSDA error: %d", err);
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return;
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}
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err=i2cAttachSCL(i2c, pinToESP32Pin(scl));
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if ( err != I2C_ERROR_OK ) {
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jsError( "jshI2CSetup: i2cAttachSCL error: %d", err);
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return;
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}
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}
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void jshI2CWrite(IOEventFlags device,
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unsigned char address,
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int nBytes,
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const unsigned char *data,
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bool sendStop) {
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// i2cWrite(i2c_t * i2c, uint16_t address, bool addr_10bit, uint8_t * data, uint8_t len, bool sendStop);
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i2c_err_t err=i2cWrite(i2c,address,false,data,nBytes,sendStop);
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if ( err != I2C_ERROR_OK ) {
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jsError( "jshI2CSetup: i2cAttachSCL error: %d", err);
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return;
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}
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}
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void jshI2CRead(IOEventFlags device,
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unsigned char address,
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int nBytes,
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unsigned char *data,
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bool sendStop) {
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i2c_err_t err=i2cRead(i2c,address,false,data,nBytes,sendStop);
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if ( err != I2C_ERROR_OK ) {
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jsError( "jshI2CSetup: i2cAttachSCL error: %d", err);
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return;
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}
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}
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