diff options
Diffstat (limited to 'Keithley179.c')
| -rw-r--r-- | Keithley179.c | 195 |
1 files changed, 195 insertions, 0 deletions
diff --git a/Keithley179.c b/Keithley179.c new file mode 100644 index 0000000..734336c --- /dev/null +++ b/Keithley179.c @@ -0,0 +1,195 @@ + +#ifndef F_CPU +#define F_CPU 4000000UL +#endif + +#include <avr/io.h> +#include <avr/interrupt.h> + +#define UART_BAUDRATE 9600 + +#define UBRR_VAL (F_CPU / UART_BAUDRATE * 16) - 1 + +#define b1 PC0 +#define b2 PC1 +#define b3 PC2 +#define b4 PC3 + +#define d1 PD7 +#define d2 PD4 +#define d3 PD5 +#define d4 PD6 +#define d5 PC3 + +#define busy PB7 //Busy not Used + +//Status +uint8_t UART_RX; +uint8_t UART_RX_END; +uint8_t UART_isInit; + +//Buffers +char out[5]; //Buffer for ADC Input +char in[16]; //UART Input Buffer +uint8_t in_cntr; //Counter for UART Input Buffer + +ISR(USART_RXC_vect) +{ + cli(); + in[in_cntr] = UDR; + if(in[in_cntr] == '\n') + UART_RX_END = 1; //Set RX End Flag + + //Check if Buffer is full + if(in_cntr < 15) + in_cntr ++; + else + { + in_cntr = 0; + UART_RX_END = 1; //Set RX End Flag + } + sei(); +}//USART_RXC_vect + +void UART_Init(); +/* +*Initializes the UART Interface +*/ + +void UART_Handle(); +/* +* should be called on Interrupt of UART +* Handles UART Communication +*/ + +void UART_Send(char *_cSend); +/* +*Sends String over UART +*/ + +int main(void) +{ + //clear Buffers + for(int i = 0; i < 5;i++) + { + out[i] = 0; + } + + for(int i = 0; i < 16;i++) + { + in[i] = 0; + } + + + char temp = 0; + in_cntr = 0; + + UART_RX = 0; + UART_RX_END = 0; + UART_isInit = 0; + + //Set DDRD as Input + DDRD = 0; + DDRC = 0; + + DDRD |= (1<<PD1); //TX Pin + + sei(); + + //INIT UART Interface + UART_Init(); + UART_Send("Hello World!"); + + //main loop + while(1) + { + while(!(PORTD & (1<<d1))); + temp = PINB << 4; + out[4] = temp >> 4; + temp = 0; + + while(!(PORTD & (1<<d2))); + temp = PINB << 4; + out[3] = temp >> 4; + temp = 0; + + while(!(PORTD & (1<<d3))); + temp = PINB << 4; + out[2] = temp >> 4; + temp = 0; + + while(!(PORTD & (1<<d4))); + temp = PINB << 4; + out[1] = temp >> 4; + temp = 0; + + while(!(PORTC & (1<<d5))); + temp = PINB << 4; + out[0] = temp >> 4; + temp = 0; + + + //Convert to ASCII + for(int i = 0; i < 5;i++) + { + out[i] = out[i] + 48; + } + + UART_Send(out); + //Handle UART + //UART_Handle(); + + //Reset Buffer + for(int i = 0; i < 5;i++) + { + out[i] = 0; + } + + } + + return 0; +}//main + + + +void UART_Init() +{ + if(UART_isInit == 0) + { + //Calculate Value for Register + uint16_t baudrate = (4000000 / (9600 * 16)) - 1; + + //Set Baudrate + UBRRL = baudrate; + UBRRH = (baudrate >> 8); + + UCSRB |= (1<<RXEN) | (1<<TXEN); //Enable Reciever and Transmitter + UCSRB |= (1<<RXCIE); //Enable Recieve Complete Interrupt + + UART_isInit = 1; + } + +}//UART_Init + + + +void UART_Handle() +{ + if(UART_isInit == 1) + { + + } +}//UART_Handle + +void UART_Send(char *_cSend) +{ + if(UART_isInit == 1) + { + while(*_cSend) + { + while (!(UCSRA & (1<<UDRE))); + UDR = _cSend; + _cSend++; + } + } +}//UART_send
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