I have a simple Bootloader test program that shows the generated code for the 5LP gets stuck once the 64 char SW FIFO gets full (Write index = 63, Read index = 0).
For some reason, the UART code seems to stop pulling from the FIFO. It gets stuck in UART1_PutChar() at line 1067 of .\Generated_Source\PSoC5\UART1.c :
do { /* Block if software buffer is full, so we don't overwrite. */ #if ((UART1_TX_BUFFER_SIZE > UART1_MAX_BYTE_VALUE) && (CY_PSOC3)) /* Disable TX interrupt to protect variables from modification */ UART1_DisableTxInt(); #endif /* (UART1_TX_BUFFER_SIZE > UART1_MAX_BYTE_VALUE) && (CY_PSOC3) */ locTxBufferWrite = UART1_txBufferWrite; locTxBufferRead = UART1_txBufferRead; #if ((UART1_TX_BUFFER_SIZE > UART1_MAX_BYTE_VALUE) && (CY_PSOC3)) /* Enable interrupt to continue transmission */ UART1_EnableTxInt(); #endif /* (UART1_TX_BUFFER_SIZE > UART1_MAX_BYTE_VALUE) && (CY_PSOC3) */ } --> while( (locTxBufferWrite < locTxBufferRead) ? (locTxBufferWrite == (locTxBufferRead - 1u)) : ((locTxBufferWrite - locTxBufferRead) == (uint8)(UART1_TX_BUFFER_SIZE - 1u)) ); All I see are the first 2 chars ("..") on my terminal before everything stops in this simple test setup to reproduce the problem on my CY8CKIT-058 board:
#include <project.h> int main() { UART1_CyBtldrCommStart(); // Starts the communication interface and enables its interrupts & callbacks char str[] = "."; //"\r\nThis is a sample string."; uint16 written = 0; cystatus ret = CYRET_SUCCESS; for (uint16 loopCount = 0; ret == CYRET_SUCCESS; loopCount++) { Pin_User_LED_Write(loopCount & 1); //UART1_PutChar('.'); ret = UART1_CyBtldrCommWrite((uint8 *)str, sizeof(str), &written, 0); //CyDelay(10 * UART1_BL_CHK_DELAY_MS); <----- this keeps it from getting stuck at a full FIFO } } Environment:
PSoC Creator 4.0 (4.0.0.432)
Culture: English (United States)
OS Version: Microsoft Windows NT 6.1.7601 Service Pack 1
CLR Version: 4.0.30319.42000
Installed CyInstaller Products:
CY8CKIT-059 PSoC 5LP Prototyping Kit 1.0 Rev.**
Cypress Document Manager 1.0 SP1
Peripheral Driver Library 2.1.0
PSoC Programmer 3.25.0
PSoC Creator 3.3 CP3
PSoC Creator 4.0 <--- using this one
Bootloader v1.50
cy_boot v5.50
UART v2.50
UART_Rx/Tx cy_pins v2.20
Anybody should be able to reproduce this with PSoC Creator 4.0, a CY8CKIT-059, a simple project with only a Bootloader component (mine is set for Dual-application mode) and a UART component, and the main() of main.c I pasted above. Can anybody explain why that's happening before I cry "BUG!!!" ?
