Posted on November 29, 2017 at 07:51Hi everyone
That link page 12864 I2C LCD
(
https://community.st.com/external-link.jspa?url=http%3A%2F%2Fzhongbest.com%2F2017%2F04%2F05%2Fi2c-lcd12864%25E6%2598%25BE%25E7%25A4%25BA%25E5%25B1%258F%25E5%2585%25BC%25E5%25AE%25B9arduino%2F
)
I have a question. (STM32F207)
12864 to STM32F207 and try to use it.There is only AVR or Arduino sample as below.
I will find the LCD STM sample source.
Could you change the AVR source below to ST HAL based?I did not think of AVR, so I did not have time.Have a nice day!!
#include <avr/io.h>
#include <avr/interrupt.h>
#include <avr/signal.h>
void I2C_init(void)
{
TWBR = 0x80; // set the bit rate
TWAR = 0x00; // set the slave address
TWSR |= 0x00; // Set the division factor
TWCR = 0X00;
DDRC=DDRC&0XF7;//PC3 check LCD BUSY
PORTC=PORTC|0X08;
}
void busy(void)
{
while(PINC&0x08); //Check LCD busy
}
// Arbitration becomes host and sends START signal
// return value: 1 for success, 0 for failure
uint8_t I2C_start(void)
{
busy();
TWCR|=(1<<TWINT)|(1<<TWEN)|(1<<TWSTA);
while(!(TWCR & (1<<TWINT)));
if(((TWSR & 0xf8)!=0x08) && ((TWSR & 0xf8)!=0x10))
return 0;
return 1;
}
// stop communication and send STOP signal)`
void I2C_stop(void)
{
TWCR|=(1<<TWINT)|(1<<TWEN)|(1<<TWSTO);
}
// Issued from the machine address and write command, that is, SLA + W, into the MT mode
// return value: 1 for success, 0 for failure
uint8_t I2C_to_write(void)
{
TWDR=0;
TWCR=(TWCR&0X0F)|(1<<TWINT)|(1<<TWEN);
while(!(TWCR &(1<<TWINT)));
if((TWSR & 0xf8)!=0x18)
return 0;
return 1;
}
// send data to the slave
// return value: 0 for failure, 1 for ACK, 2 for NOT ACK
uint8_t I2C_send(uint8_t data)
{
busy();
TWDR=data;
TWCR=(TWCR&0X0F)|(1<<TWINT)|(1<<TWEN);
while(!(TWCR & (1<<TWINT)));
if((TWSR & 0xf8)==0x28)
return 1;
else if((TWSR & 0xf8)==0x30)
return 2;
return 0;
}
