Fix warnings in STM32h5 app

Author: danielinux

test-app/app_stm32h5.c

@@ -50,6 +50,8 @@ extern const CK_FUNCTION_LIST wolfpkcs11nsFunctionList;
 #ifdef WOLFCRYPT_SECURE_MODE
 int benchmark_test(void *args);
 int wolfcrypt_test(void *args);
+#include "wolfssl/wolfcrypt/types.h"
+#include "wolfssl/wolfcrypt/random.h"
 #endif
 
 #ifdef WOLFCRYPT_TZ_PSA
@@ -250,7 +252,7 @@ int cmd_reboot(const char *args)
 static uint8_t crc8(uint8_t *data, size_t len)
 {
     uint8_t checksum = 0;
-    for (int i = 0; i < len; i++) {
+    for (size_t i = 0; i < len; i++) {
         checksum += data[i];
     }
     return checksum;
@@ -262,7 +264,7 @@ static uint8_t crc8(uint8_t *data, size_t len)
 
 static void xcancel(void)
 {
-    int i;
+    uint32_t i;
     for (i = 0; i < 10; i++)
         uart_tx(XCAN);
 }
@@ -1258,9 +1260,15 @@ void isr_usart3(void)
 
 static int uart_rx_isr(unsigned char *c, int len)
 {
+    uint32_t avail;
     UART_CR1(UART3) &= ~UART_ISR_RX_NOTEMPTY;
-    if (len > (uart_rx_bytes - uart_processed))
-        len = (uart_rx_bytes - uart_processed);
+    if (len < 0) {
+        len = 0;
+    }
+    avail = uart_rx_bytes - uart_processed;
+    if ((uint32_t)len > avail) {
+        len = (int)avail;
+    }
     if (len > 0) {
         memcpy(c, uart_buf_rx + uart_processed, len);
         uart_processed += len;