Apple-1-Tools
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apple1-videocard-lib
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remove dead code, format code

This commit is contained in:
nino-porcino 2022-02-28 14:29:13 +01:00
parent b9c5586b20
commit 2ef08c2fba
1 changed files with 7 additions and 22 deletions
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29
demos/sdcard/sdcard.c
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@ -73,22 +73,7 @@ __address(18) byte *token_ptr;
#define MCU_STROBE_HIGH 128
#define MCU_STROBE_LOW 0
/*
void wait_mcu_strobe(byte v) {
if(TIMEOUT) return;
TIMEOUT_CNT = 0;
while((v==0 && MCU_STROBE != 0) || (v!=0 && MCU_STROBE == 0)) {
TIMEOUT_CNT++;
if(TIMEOUT_CNT > TIMEOUT_MAX) {
TIMEOUT = 1;
break;
}
}
}
*/
void wait_mcu_strobe(byte v) {
void wait_mcu_strobe(byte v) {
if(TIMEOUT) return;
TIMEOUT_CNT = 0;
@ -102,8 +87,8 @@ void wait_mcu_strobe(byte v) {
}
void send_byte_to_MCU(byte data) {
*VIA_DDRA = 0xFF; // set port A as output
*VIA_PORTA = data; // deposit byte on the data port
*VIA_DDRA = 0xFF; // set port A as output
*VIA_PORTA = data; // deposit byte on the data port
CPU_STROBE(1); // set strobe high
wait_mcu_strobe(MCU_STROBE_HIGH); // wait for the MCU to read the data
CPU_STROBE(0); // set strobe low
@ -111,10 +96,10 @@ void send_byte_to_MCU(byte data) {
}
byte receive_byte_from_MCU() {
*VIA_DDRA = 0; // set port A as input
*VIA_DDRA = 0; // set port A as input
CPU_STROBE(0); // set listen
wait_mcu_strobe(MCU_STROBE_HIGH); // wait for the MCU to deposit data
byte data = *VIA_PORTA; // read data
byte data = *VIA_PORTA; // read data
CPU_STROBE(1); // set strobe high
wait_mcu_strobe(MCU_STROBE_LOW); // wait for the MCU to set strobe low
CPU_STROBE(0); // set strobe low
@ -122,8 +107,8 @@ byte receive_byte_from_MCU() {
}
void VIA_init() {
*VIA_DDRB = 1; // pin 1 is output (CPU_STROBE), pin7 is input (MCU_STROBE)
CPU_STROBE(0); // initial state
*VIA_DDRB = 1; // pin 1 is output (CPU_STROBE), pin7 is input (MCU_STROBE)
CPU_STROBE(0); // initial state
}
// send a string to the MCY (0 terminator is sent as well)