83 lines
2.1 KiB
C
83 lines
2.1 KiB
C
// Copyright 2021 IOsetting <iosetting(at)outlook.com>
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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/***
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* Demo: AT24C32
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* Board: STC8H3K32
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*
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* P32 -> SCL
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* P33 -> SDA
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* GND -> GND, A0, A1, A2
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* 3.3V -> VCC
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*/
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#include "fw_hal.h"
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// AT24C device address, change according to the voltage level of A0/A1/A2
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#define AT24C_ADDR 0xA0
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// Test data
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__CODE int8_t dat[20] = {0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB};
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void I2C_Init(void)
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{
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// Master mode
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I2C_SetWorkMode(I2C_WorkMode_Master);
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/**
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* I2C clock = FOSC / 2 / (__prescaler__ * 2 + 4)
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*/
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I2C_SetClockPrescaler(0x3F);
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// Switch alternative port
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I2C_SetPort(I2C_AlterPort_P32_P33);
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// Start I2C
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I2C_SetEnabled(HAL_State_ON);
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}
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void GPIO_Init(void)
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{
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// SDA
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GPIO_P3_SetMode(GPIO_Pin_3, GPIO_Mode_InOut_QBD);
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// SCL
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GPIO_P3_SetMode(GPIO_Pin_2, GPIO_Mode_Output_PP);
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}
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int main(void)
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{
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uint8_t offset, i, buf[20];
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SYS_SetClock();
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// UART1 configuration: baud 115200 with Timer2, 1T mode, no interrupt
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UART1_Config8bitUart(UART1_BaudSource_Timer2, HAL_State_ON, 115200);
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GPIO_Init();
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I2C_Init();
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I2C_Write16BitAddr(AT24C_ADDR, 0x0000, dat, 12);
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while(1)
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{
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for (offset = 0; offset < 4; offset++)
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{
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I2C_Read16BitAddr(AT24C_ADDR, 0x0000|offset, buf, 6);
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for (i = 0; i < 6; i++)
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{
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UART1_TxHex(buf[i]);
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UART1_TxChar(':');
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}
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UART1_TxString(" ");
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SYS_Delay(10);
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}
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UART1_TxString("\r\n");
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SYS_Delay(1000);
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}
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}
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