Z180 parameter checks

[z180-stamp.git] / avr / main.c

diff --git a/avr/main.c b/avr/main.c
index 5a0d7928ea4b45aa9c7822d04dc84c1cd7ed1fe4..423b48a7806e8a11ad7f528fdf99152af3c8f83b 100644 (file)
--- a/avr/main.c
+++ b/avr/main.c
@@ -1,14 +1,14 @@
 /*
  * (C) Copyright 2014 Leo C. <erbl259-lmu@yahoo.de>
  *
- * SPDX-License-Identifier:    GPL-2.0+
+ * SPDX-License-Identifier:    GPL-2.0
  */
 
 
 #include "common.h"
 #include <avr/interrupt.h>
+#include <avr/wdt.h>
 #include <stdlib.h>
-#include <stdio.h>
 
 #include "config.h"
 #include "ff.h"
@@ -25,18 +25,31 @@
 #include "rtc.h"
 #include "debug.h"
 
-static uint8_t mcusr;
+uint8_t mcusr __attribute__ ((section (".noinit")));
 
-/*--------------------------------------------------------------------------*/
 #if DEBUG
-
 __attribute__ ((naked)) __attribute__ ((section (".init3")))
 void preset_ram (void)
 {
-       for (uint8_t *p = RAMSTART; p <= (uint8_t *) RAMEND; p++)
+       for (uint8_t *p = (uint8_t *) RAMSTART; p <= (uint8_t *) RAMEND; p++)
                *p = 0xdd;
 
 }
+#endif
+
+__attribute__ ((naked)) __attribute__ ((section (".init3")))
+void get_mcusr (void)
+{
+       /* save and clear reset reason(s) */
+       /* TODO: move to init section? */
+       mcusr = MCUSR;
+       MCUSR = 0;
+
+       wdt_disable();
+}
+
+/*--------------------------------------------------------------------------*/
+#if DEBUG
 
 static const FLASH char * const FLASH rreasons[] = {
                        FSTR("Power on"),
@@ -78,13 +91,6 @@ ISR(INT6_vect)
 static
 void setup_avr(void)
 {
-       /* save and clear reset reason(s) */
-       /* TODO: move to init section? */
-       mcusr = MCUSR;
-       MCUSR = 0;
-
-       /* WD */
-
        /* CPU */
 
        /* Disable JTAG Interface regardless of the JTAGEN fuse setting. */
@@ -109,10 +115,10 @@ void setup_avr(void)
        CLKPR = 0;
 
        /* Timer */
-       PRR1 &= ~_BV(PRTIM3);
-       OCR3A = F_CPU / 1000 - 1;       /* Timer3: 1000Hz interval (OC3A) */
-       TCCR3B = (0b01<<WGM32)|(0b001<<CS30); /* CTC Mode, Prescaler 1 */
-       TIMSK3 = _BV(OCIE3A);           /* Enable TC2.oca interrupt */
+       PRR1 &= ~_BV(PRTIM4);
+       OCR4A = F_CPU / 1000 - 1;       /* Timer4: 1000Hz interval */
+       TCCR4B = (0b00<<WGM42)|(0b001<<CS40); /* Normal Mode, Prescaler 1 */
+       TIMSK4 = _BV(OCIE4A);           /* Enable Output Compare A interrupt */
 
        /* INT5, INT6: falling edge */
        EICRB = (EICRB & ~((0b11 << ISC50) | (0b11 << ISC60))) |
@@ -217,7 +223,7 @@ const char *bootdelay_process(void)
        debug("### main_loop entered: bootdelay=%d\n\n", bootdelay);
        _delay_ms(20);
 
-       s = getenv(PSTR(ENV_BOOTCMD));
+       s = getenv_char(PSTR(ENV_BOOTCMD));
        stored_bootdelay = bootdelay;
        return s;
 }
@@ -225,7 +231,7 @@ const char *bootdelay_process(void)
 static
 void autoboot_command(const char *s)
 {
-       debug("### main_loop: bootcmd=\"%s\"\n", s ? s : PSTR("<UNDEFINED>"));
+       debug("### main_loop: bootcmd=\"%s\"\n", s ? s : "<UNDEFINED>");
        _delay_ms(20);
 
        if (stored_bootdelay != -1 && s && !abortboot(stored_bootdelay)) {
@@ -248,12 +254,12 @@ int main(void)
 {
        extern void setup_mmc(void);
 
+       setup_avr();
        for (int i = 0; i < GPIO_MAX; i++)
                gpio_config(i, INPUT_PULLUP);
-       setup_avr();
        setup_mmc();
-       z80_setup_bus();
        env_init();
+       z80_setup_bus();
 
        if (reset_reason_is_power_on())
                _delay_ms(CONFIG_PWRON_DELAY);
@@ -270,7 +276,7 @@ int main(void)
        setup_system_time();
        setup_fatfs();
 
-       printf_P(PSTR("\nATMEGA1281+Z8S180 Stamp Monitor\n\n"));
+       printf_P(PSTR("\n" MCU_STRING "+Z8S180 Stamp Monitor - Version: " VERSION  " \n\n"));
 
        setup_z180_serv();