move sys timer setup from main to timer.c

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

diff --git a/avr/main.c b/avr/main.c
index 8acf265b5b430f319780724655899aacb9ba2b64..0a49a1fb7cd901283be6eb9ba01f902cab73a440 100644 (file)
--- a/avr/main.c
+++ b/avr/main.c
@@ -1,15 +1,17 @@
 /*
+ * (C) Copyright 2014 Leo C. <erbl259-lmu@yahoo.de>
+ *
+ * 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 "debug.h"
+#include "ff.h"
 #include "z80-if.h"
 #include "i2c.h"
 #include "con-utils.h"
@@ -18,23 +20,38 @@
 #include "cli.h"
 #include "env.h"
 #include "z180-serv.h"
-#include "spi.h"
 #include "gpio.h"
 #include "time.h"
 #include "rtc.h"
+#include "debug.h"
+#include "cmd_fat.h"
 
-static uint8_t mcusr;
 
-/*--------------------------------------------------------------------------*/
-#if DEBUG
+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"),
@@ -50,15 +67,17 @@ void print_reset_reason(void)
        uint8_t r = mcusr & 0x1f;
        const FLASH char * const FLASH *p = rreasons;
 
-       printf_P(PSTR("### Reset reason(s): %s"), r ? "" : "none");
+       my_puts_P(PSTR("### Reset reason(s): "));
+       if (r == 0)
+               my_puts_P(PSTR("none"));
        for ( ; r; p++, r >>= 1) {
                if (r & 1) {
                        my_puts_P(*p);
                        if (r & ~1)
-                               printf_P(PSTR(", "));
+                               my_puts_P(PSTR(", "));
                }
        }
-       printf_P(PSTR(".\n"));
+       my_puts_P(PSTR(".\n"));
 }
 
 #endif
@@ -76,13 +95,6 @@ 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. */
@@ -98,7 +110,7 @@ void setup_avr(void)
                _BV(PRUSART3) | _BV(PRUSART2) | _BV(PRUSART1);
 
 
-       /* disable analog comparator */
+       /* Disable analog comparator */
        ACSR = _BV(ACD);
        /* Ports */
 
@@ -106,18 +118,8 @@ void setup_avr(void)
        CLKPR = _BV(CLKPCE);
        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 */
-
-       /* SPI as master */
-       PRR0 &= ~_BV(PRSPI);
-       SPI_DDR = (SPI_DDR & ~_BV(SPI_MISO))
-                       | _BV(SPI_MOSI) | _BV(SPI_SCK) | _BV(SPI_SS);
-       SPI_PORT = (SPI_PORT & ~(_BV(SPI_MOSI) | _BV(SPI_SCK)))
-                       | _BV(SPI_SS);
+       /* System timer */
+       setup_timer();
 
        /* INT5, INT6: falling edge */
        EICRB = (EICRB & ~((0b11 << ISC50) | (0b11 << ISC60))) |
@@ -144,6 +146,7 @@ void setup_system_time(void)
        set_system_time(mk_gmtime(&rtc_time) );
 }
 
+
 /*--------------------------------------------------------------------------*/
 
 /* Stored value of bootdelay, used by autoboot_command() */
@@ -211,7 +214,7 @@ const char *bootdelay_process(void)
        debug("### main_loop entered: bootdelay=%d\n\n", bootdelay);
        _delay_ms(20);
 
-       s = getenv(PSTR(ENV_BOOTCMD));
+       s = getenv_str(PSTR(ENV_BOOTCMD));
        stored_bootdelay = bootdelay;
        return s;
 }
@@ -219,7 +222,7 @@ 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 : "");
        _delay_ms(20);
 
        if (stored_bootdelay != -1 && s && !abortboot(stored_bootdelay)) {
@@ -240,11 +243,15 @@ void main_loop(void)
 
 int main(void)
 {
+       extern void setup_mmc(void);
+
+       __malloc_margin = CONFIG_SYS_MALLOC_MARGIN;
        setup_avr();
-       z80_setup_bus();
        for (int i = 0; i < GPIO_MAX; i++)
                gpio_config(i, INPUT_PULLUP);
+       setup_mmc();
        env_init();
+       z80_setup_bus();
 
        if (reset_reason_is_power_on())
                _delay_ms(CONFIG_PWRON_DELAY);
@@ -257,16 +264,11 @@ int main(void)
        print_reset_reason();
 #endif
 
-#if DEBUG
-       unsigned long i_speed = getenv_ulong(PSTR("i2c_clock"), 10, CONFIG_SYS_I2C_CLOCK);
-       debug("### Setting I2C clock Frequency to %lu Hz.\n", i_speed);
-       i2c_init(i_speed);
-#else
        i2c_init(CONFIG_SYS_I2C_CLOCK);
-#endif
        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();