kopia lustrzana https://github.com/OpenRTX/OpenRTX
Driver for AT24Cx external EEPROM present on GDx devices
Silvano Seva
rodzic
b393cdad8d
commit
ff7216e9cd
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@ -257,6 +257,7 @@ dm1801_src = src + mk22fn512_src + ['platform/targets/DM-1801/platform.c',
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'platform/drivers/display/UC1701_GD77.c',
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'platform/drivers/keyboard/keyboard_GD77.c',
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'platform/drivers/NVM/W25Qx.c',
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'platform/drivers/NVM/AT24Cx_GDx.c',
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'platform/drivers/NVM/spiFlash_GDx.c',
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'platform/drivers/ADC/ADC0_GDx.c',
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'platform/drivers/baseband/rtx_GDx.c']
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@ -0,0 +1,51 @@
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/***************************************************************************
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* Copyright (C) 2020 by Federico Amedeo Izzo IU2NUO, *
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* Niccolò Izzo IU2KIN *
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* Frederik Saraci IU2NRO *
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* Silvano Seva IU2KWO *
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 3 of the License, or *
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* (at your option) any later version. *
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* *
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* This program is distributed in the hope that it will be useful, *
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* but WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
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* GNU General Public License for more details. *
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* *
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* You should have received a copy of the GNU General Public License *
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* along with this program; if not, see <http://www.gnu.org/licenses/> *
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***************************************************************************/
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#ifndef AT24Cx_H
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#define AT24Cx_H
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#include <stdint.h>
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#include <sys/types.h>
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/**
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* Driver for ATMEL AT24Cx family of I2C EEPROM devices, used as external non
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* volatile memory on various radios to store global settings and contact data.
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*/
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/**
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* Initialise driver for external EEPROM.
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*/
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void AT24Cx_init();
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/**
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* Terminate driver for external EEPROM.
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*/
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void AT24Cx_terminate();
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/**
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* Read data from EEPROM memory.
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*
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* @param addr: start address for read operation.
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* @param buf: pointer to a buffer where data is written to.
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* @param len: number of bytes to read.
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*/
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void AT24Cx_readData(uint32_t addr, void *buf, size_t len);
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#endif /* AT24Cx_H */
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@ -0,0 +1,62 @@
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/***************************************************************************
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* Copyright (C) 2020 by Federico Amedeo Izzo IU2NUO, *
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* Niccolò Izzo IU2KIN *
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* Frederik Saraci IU2NRO *
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* Silvano Seva IU2KWO *
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 3 of the License, or *
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* (at your option) any later version. *
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* *
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* This program is distributed in the hope that it will be useful, *
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* but WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
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* GNU General Public License for more details. *
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* *
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* You should have received a copy of the GNU General Public License *
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* along with this program; if not, see <http://www.gnu.org/licenses/> *
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***************************************************************************/
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#include "AT24Cx.h"
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#include <I2C0.h>
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#include <gpio.h>
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#include <delays.h>
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#include <stdint.h>
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#include <hwconfig.h>
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static const uint8_t devAddr = 0xA0; /* EEPROM I2C address */
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void AT24Cx_init()
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{
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gpio_setMode(I2C_SDA, OPEN_DRAIN);
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gpio_setMode(I2C_SCL, OPEN_DRAIN);
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gpio_setAlternateFunction(I2C_SDA, 3);
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gpio_setAlternateFunction(I2C_SCL, 3);
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i2c0_init();
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}
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void AT24Cx_terminate()
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{
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i2c0_terminate();
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gpio_setMode(I2C_SDA, INPUT);
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gpio_setMode(I2C_SCL, INPUT);
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}
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void AT24Cx_readData(uint32_t addr, void* buf, size_t len)
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{
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uint16_t a = __builtin_bswap16((uint16_t) addr);
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/*
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* On GDx devices the I2C bus is shared between the EEPROM and the AT1846S,
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* so we have to acquire exclusive ownership before exchanging data
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*/
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i2c0_lockDeviceBlocking();
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i2c0_write(devAddr, &a, 2, false);
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delayUs(10);
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i2c0_read(devAddr, buf, len);
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i2c0_releaseDevice();
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}
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@ -78,4 +78,8 @@
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#define FLASH_SDO GPIOE,4
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#define FLASH_SDI GPIOA,19
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/* I2C for EEPROM and AT1846S */
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#define I2C_SDA GPIOE,25
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#define I2C_SCL GPIOE,24
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#endif
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@ -0,0 +1,63 @@
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/***************************************************************************
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* Copyright (C) 2020 by Federico Amedeo Izzo IU2NUO, *
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* Niccolò Izzo IU2KIN, *
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* Frederik Saraci IU2NRO, *
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* Silvano Seva IU2KWO *
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 3 of the License, or *
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* (at your option) any later version. *
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* *
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* This program is distributed in the hope that it will be useful, *
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* but WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
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* GNU General Public License for more details. *
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* *
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* You should have received a copy of the GNU General Public License *
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* along with this program; if not, see <http://www.gnu.org/licenses/> *
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***************************************************************************/
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#include <stdio.h>
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#include <stdint.h>
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#include <sys/types.h>
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#include <AT24Cx.h>
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void printChunk(void *chunk)
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{
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uint8_t *ptr = ((uint8_t *) chunk);
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for(size_t i = 0; i < 16; i++) printf("%02x ", ptr[i]);
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for(size_t i = 0; i < 16; i++)
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{
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if((ptr[i] > 0x22) && (ptr[i] < 0x7f))
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{
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printf("%c", ptr[i]);
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}
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else
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{
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printf(".");
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}
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}
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}
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int main()
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{
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AT24Cx_init();
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while(1)
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{
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getchar();
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for(uint16_t addr = 0; addr < 0x10000; addr += 16)
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{
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uint8_t buf[16];
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AT24Cx_readData(addr, buf, 16);
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printf("\r\n%lx: ", addr);
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printChunk(buf);
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puts("\r");
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}
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}
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return 0;
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}
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