huh

README.md

@@ -26,17 +26,46 @@ Resolving domain name "hye.su"...
 > Partial DNS message: 11 23 81 82 00 01 00 00 00 00 00 00 03 68 79 65 00 00 00 02 73
 DNS_run() failed, res = 0
 ```
+
 w/ ch32v003fun
+
 > Partial DNS message: `11 23 81 82 00 01 00 00 00 00 00 00 03 68 79 65 00 00 00 02 73`
-**DNS_run() failed, res = 0**
+> **DNS_run() failed, res = 0**
 
 w/ WCH HAL (none-os).. I get a full response
+
 > Receive DNS message from 192.168.102.1(53). len = 56
 > Partial DNS message: `11 23 81 80 00 01 00 02 00 00 00 00 03 68 79 65 02 73 75 00 00 01 00 01 C0 0C 00 01 00 01 00 00 01 2C 00 04 68 15 33 7F C0 0C 00 01 00 01 00 00 01 2C 00 04 AC 43 B4 9A `
-Result: 172.67.180.154
+> Result: 172.67.180.154
 
 `RCC_CTLR`, GPIO Registers, `SPIx_CTLR1` registers are identical
 
+## LA
+
+### ch32v003fun
+
+![ch32v003fun](notes/2024-10-10-191033_1876x540_scrot.png)
+
+```
+00 00 34 11 27 01 00 00 01 00 00 00 00 00 00 03 68 79 65 00 00 00 02 73 75 00 00 00 00 01 00 01
+```
+
+- 32 bytes long
+- (Post `68 79 65`): `00 00 00 02 73 75 00 00 00 00 01 00 01`
+
+### none-os
+
+![none-os](notes/2024-10-10-191043_1891x525_scrot.png)
+
+```
+00 00 34 11 27 01 00 00 01 00 00 00 00 00 00 03 68 79 65 02 73 75 00 00 01 00 01
+```
+
+- 27 bytes long
+- (Post `68 79 65`): `02 73 75 00 00 01 00 01`
+
+## none-os
+
 ```c
   // Initialize GPIO for W5500 CS
   RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);

src/main.c

@@ -74,8 +74,8 @@ void init_spi(void) {
   SPI1->CTLR1 = 0;
 
   // set prescaler
-  // 001: FPCLK/4;
+  // 011: FPCLK/16
-  SPI1->CTLR1 = (SPI1->CTLR1 & ~SPI_CTLR1_BR) | (0x1 << 3);
+  SPI1->CTLR1 = (SPI1->CTLR1 & ~SPI_CTLR1_BR) | (0x3 << 3);
 
   // set clock polarity and phase
   SPI1->CTLR1 |= (SPI_CPOL_Low | SPI_CPHA_1Edge);
@@ -174,25 +174,23 @@ int main(void) {
   printf("Calling DNS_init()...\r\n");
   DNS_init(DNS_SOCKET, dns_buffer);
 
+  const char domain_name[] = "hye.su";
   uint8_t addr[4];
-  {
+  int8_t res;
-    char domain_name[] = "hye.su";
+  uint8_t retries = 0;
+
+  while (retries < 10) {
+    Delay_Ms(250);
+
     printf("Resolving domain name \"%s\"...\r\n", domain_name);
-    int8_t res = DNS_run(dns, (uint8_t*)&domain_name, addr);
+    res = DNS_run(dns, (uint8_t *)domain_name, addr);
-    if (res != 1) {
+
-      printf("DNS_run() failed, res = %d", res);
+    if (res == 1) {
-      return 1;
-    }
       printf("Result: %d.%d.%d.%d\r\n", addr[0], addr[1], addr[2], addr[3]);
+    } else {
+      printf("DNS_run() failed, res = %d. Retries: %u\r\n", res, retries);
     }
 
-  while (1) {
+    retries++;
-    GPIOB->BSHR = (1 << 3) | (1 << 4);
-    printf("+%lu\n", count++);
-    Delay_Ms(1000);  // from ch32v003fun.h
-
-    GPIOB->BCR = (1 << 3) | (1 << 4);
-    printf("-%lu\n", count++);
-    Delay_Ms(1000);
   }
 }