+static uint32_t
+ao_get_hex32(void)
+{
+ int8_t n;
+ uint32_t v = 0;
+
+ for (;;) {
+ n = ao_usb_getchar();
+ if (n != ' ')
+ break;
+ }
+ for(;;) {
+ if ('0' <= n && n <= '9')
+ n = n - '0';
+ else if ('a' <= n && n <= 'f')
+ n = n - ('a' - 10);
+ else if ('A' <= n && n <= 'F')
+ n = n - ('A' - 10);
+ else
+ break;
+ v = (v << 4) | n;
+ n = ao_usb_getchar();
+ }
+ return v;
+}
+
+void
+ao_block_erase(void)
+{
+ uint32_t addr = ao_get_hex32();
+ uint32_t *p = (uint32_t *) addr;
+
+ ao_flash_erase_page(p);
+}
+
+void
+ao_block_write(void)
+{
+ uint32_t addr = ao_get_hex32();
+ uint32_t *p = (uint32_t *) addr;
+ union {
+ uint8_t data8[256];
+ uint32_t data32[64];
+ } u;
+ uint16_t i;
+
+ if (addr < (uint32_t) AO_BOOT_APPLICATION_BASE) {
+ ao_put_string("Invalid address\n");
+ return;
+ }
+ for (i = 0; i < 256; i++)
+ u.data8[i] = ao_usb_getchar();
+ ao_flash_page(p, u.data32);
+}
+
+void
+ao_block_read(void)
+{
+ uint32_t addr = ao_get_hex32();
+ uint8_t *p = (uint8_t *) addr;
+ uint16_t i;
+ uint8_t c;
+
+ for (i = 0; i < 256; i++) {
+ c = *p++;
+ ao_usb_putchar(c);
+ }
+}
+
+static void
+ao_show_version(void)
+{
+ ao_put_string("altos-loader");
+ ao_put_string("\nmanufacturer "); ao_put_string(ao_manufacturer);
+ ao_put_string("\nproduct "); ao_put_string(ao_product);
+ ao_put_string("\nsoftware-version "); ao_put_string(ao_version);
+ ao_put_string("\n");
+}
+
+static void
+ao_flash_task(void) {
+ for (;;) {
+ ao_usb_flush();
+ switch (ao_usb_getchar()) {
+ case 'v': ao_show_version(); break;
+ case 'a': ao_application(); break;
+ case 'X': ao_block_erase(); break;
+ case 'W': ao_block_write(); break;
+ case 'R': ao_block_read(); break;
+ }
+ }
+}