led: Convert code to use a task

There is no need for a custom check_blink_time() function as this can
be done from a new led_blink_task().

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>

src/Makefile

@@ -1,3 +1,4 @@
 # Main code build rules
 
-src-y += canboot_main.c sched.c command.c led.c
+src-y += canboot_main.c sched.c command.c
+src-$(CONFIG_ENABLE_LED) += led.c

src/canboot_main.c

@@ -13,22 +13,24 @@
 #include "canboot_main.h"   // canboot_main
 #include "command.h"        // command_respond_ack
 #include "ctr.h"            // DECL_CTR
-#include "led.h"            // check_blink_time
 #include "byteorder.h"      // cpu_to_le32
 #include "sched.h"          // sched_run_init
 
-#define WAIT_BLINK_TIME 1000000
-#define XFER_BLINK_TIME 20000
-
 #define REQUEST_SIG    0x5984E3FA6CA1589B // Random request sig
 
 static uint8_t page_buffer[CONFIG_MAX_FLASH_PAGE_SIZE];
 // Page Tracking
 static uint32_t last_page_address = 0;
 static uint8_t page_pending = 0;
-static uint32_t blink_time = WAIT_BLINK_TIME;
+static uint8_t is_in_transfer;
 static uint8_t complete = 0;
 
+int
+flashcmd_is_in_transfer(void)
+{
+    return is_in_transfer;
+}
+
 static void
 write_page(uint32_t page_address)
 {
@@ -41,7 +43,7 @@ write_page(uint32_t page_address)
 void
 command_read_block(uint32_t *data)
 {
-    blink_time = XFER_BLINK_TIME;
+    is_in_transfer = 1;
     uint32_t block_address = le32_to_cpu(data[1]);
     uint32_t out[CONFIG_BLOCK_SIZE / 4 + 2 + 2];
     out[2] = cpu_to_le32(block_address);
@@ -52,7 +54,7 @@ command_read_block(uint32_t *data)
 void
 command_write_block(uint32_t *data)
 {
-    blink_time = XFER_BLINK_TIME;
+    is_in_transfer = 1;
     if (command_get_arg_count(data) != (CONFIG_BLOCK_SIZE / 4) + 1) {
         command_respond_command_error();
         return;
@@ -76,7 +78,7 @@ command_write_block(uint32_t *data)
 void
 command_eof(uint32_t *data)
 {
-    blink_time = WAIT_BLINK_TIME;
+    is_in_transfer = 0;
     uint32_t flash_page_size = flash_get_page_size();
     if (page_pending) {
         write_page(last_page_address + flash_page_size);
@@ -163,7 +165,6 @@ enter_bootloader(void)
 
     for (;;) {
         sched_run_tasks();
-        check_blink_time(blink_time);
         if (complete && canbus_tx_clear())
             // wait until we are complete and the ack has returned
             break;

src/canboot_main.h

@@ -3,6 +3,7 @@
 
 #include <stdint.h> // uint32_t
 
+int flashcmd_is_in_transfer(void);
 void canboot_main(void);
 
 #endif // canboot_main.h

src/led.c

@@ -7,10 +7,13 @@
 #include "autoconf.h" // CONFIG_ENABLE_LED
 #include "board/gpio.h" // gpio_out_setup
 #include "board/misc.h" // timer_read_time
+#include "canboot_main.h" // flashcmd_is_in_transfer
 #include "ctr.h" // DECL_CTR
-#include "led.h" // check_blink_time
 #include "sched.h" // DECL_INIT
 
+#define WAIT_BLINK_TIME 1000000
+#define XFER_BLINK_TIME 20000
+
 DECL_CTR("DECL_LED_PIN " __stringify(CONFIG_STATUS_LED_PIN));
 extern uint32_t led_gpio, led_gpio_high; // Generated by buildcommands.py
 
@@ -20,8 +23,6 @@ static uint32_t last_blink_time;
 void
 led_init(void)
 {
-    if (!CONFIG_ENABLE_LED)
-        return;
     led = gpio_out_setup(led_gpio, led_gpio_high);
     // The short delay is simply to ensure that the Debug Timer is
     // enabled
@@ -31,10 +32,10 @@ led_init(void)
 DECL_INIT(led_init);
 
 void
-check_blink_time(uint32_t usec)
+led_blink_task(void)
 {
-    if (!CONFIG_ENABLE_LED)
-        return;
+    int in_transfer = flashcmd_is_in_transfer();
+    uint32_t usec = in_transfer ? XFER_BLINK_TIME : WAIT_BLINK_TIME;
     uint32_t curtime = timer_read_time();
     uint32_t endtime = last_blink_time + timer_from_us(usec);
     if (timer_is_before(endtime, curtime)) {
@@ -42,3 +43,4 @@ check_blink_time(uint32_t usec)
         last_blink_time = timer_read_time();
     }
 }
+DECL_TASK(led_blink_task);

src/led.h

@@ -1,6 +0,0 @@
-#ifndef __LED_H
-#define __LED_H
-
-void check_blink_time(uint32_t usec);
-
-#endif // led.h