(Bonus 4) GD32L233 Evaluation - Obtaining and Printing the Main Frequency of System Resources

韵湖葱白

(Bonus 4) GD32L233 Evaluation - Obtaining and Printing the Main Frequency of System Resources [Copy link]

<i class="pstatus"> This post was last edited by Yunhu Congbai on 2022-1-28 17:44 </i> ## Preface I was so happy for a while, but after checking the datasheet in detail, I found that it does not support SLCD. I wasted the 68 bare screen I bought, and I have to work on an LCD driver later. Let's start from the basics, first fix the serial port, and print the frequency of the basic system resources. ## Development environment setup supplement - Solve the burning problem When using keil for burning and debugging, if you use GD-Link directly, the debugger needs to be selected as: ``` CMSIS-DAP ARMv8-M Debugger ```  Click the "Load" button, and an error occurs: ``` --------------------------- CMSIS-DAP - ARMv8-M Error --------------------------- Cannot Load Flash Programming Algorithm! C:\Keil_Packs\GigaDevice\GD32L23x_DFP\0.0.0\Flash\GD32L23x_256K.FLM --------------------------- OK--------------------------- ``` I looked for the file GD32L23x_256K.FLM, and it was there!!! I initially suspected it was a hardware issue, so I tried using the official software, and it was able to read the data.  I searched the Internet for a long time, and tried everything from restarting, BOOT startup items, to modifying Debug parameters, and so on, but none of them worked. Finally, I found that I just needed to modify the ram size of the Algorithm. Just change the Size from `0x00001000` to `0x00002000` and it worked. I suggest the official to modify this.  ## Serial port configuration Use MiniUSB to connect to the serial port of the board, and you can see that the driver is OK. （If the CH340 driver is not installed on your computer, you should install one）  Serial port driver code: ``` void uart1_init(uint32_t baudrate) { uint32_t com = USART0; usart_deinit(com); rcu_periph_clock_enable(RCU_USART0); rcu_periph_clock_enable(RCU_GPIOA); ///< USART1_TX PA.9 gpio_af_set(GPIOA, GPIO_AF_7, GPIO_PIN_9); gpio_mode_set(GPIOA, GPIO_MODE_AF, GPIO_PUPD_PULLUP, GPIO_PIN_9); gpio_output_options_set(GPIOA, GPIO_OTYPE_PP, GPIO_OSPEED_50MHZ, GPIO_PIN_9); ///< USART1_RX PA.10 gpio_af_set(GPIOA, GPIO_AF_7, GPIO_PIN_10); gpio_mode_set(GPIOA, GPIO_MODE_AF, GPIO_PUPD_PULLUP, GPIO_PIN_10); gpio_output_options_set(GPIOA , GPIO_OTYPE_PP, GPIO_OSPEED_50MHZ, GPIO_PIN_10); usart_baudrate_set(com, baudrate); usart_word_length_set(com, USART_WL_8BIT); usart_stop_bit_set(com, USART_STB_1BIT); usart_parity_config(com, USART_PM_NONE); usart_hardware_flow_rts_config(com, USART_RTS_DISABLE); usart_hardware_flow_cts_config(com, USART_CTS_DISABLE); usart_receive_config(com, USART_RECEIVE_ENABLE); usart_transmit_config(com, USART_TRANSMIT_ENABLE); usart_enable(com); nvic_irq_enable(USART0_IRQn, 3 ); } ``` Serial port printing redirection printf, without MicroLiB: ``` #define PRINTF_UART USART0 __ASM (".global __use_no_semihosting"); /* FILE is typedef' d in stdio.h. */ FILE __stdout; void _sys_exit(int x) { x = x; } void _ttywrch(int ch) { ch = ch; } void _sys_command_string(int ch) { ch = ch; } /* retarget the C library printf function to the USART */ int fputc(int ch, FILE *f) { usart_data_transmit(PRINTF_UART, (uint8_t)ch); while(RESET == usart_flag_get(PRINTF_UART, USART_FLAG_TBE)); return ch; } ``` ## To get the system frequency, just call the API directly: `rcu_clock_freq_get`. I would like to complain about the inconsistency of the official API. The M4 API is indeed missing something! ! -_- It is recommended that the official should ensure consistency.  测试的代码比较简单： ``` static void freq_test(void) { #ifdef FREQ_TEST uint32_t freq[5]; #ifdef STM32 RCC_ClocksTypeDef clock; RCC_GetClocksFreq(&clock); freq[0] = clock.SYSCLK_Frequency/1000000; freq[1] = clock.HCLK_Frequency/1000000; freq[2] = clock.PCLK1_Frequency/1000000; freq[3] = clock.PCLK2_Frequency/1000000; freq[4] = clock.ADCCLK_Frequency/1000000; #endif #ifdef GD32 freq[0] = rcu_clock_freq_get(CK_SYS)/1000000; freq[1] = rcu_clock_freq_get(CK_AHB)/1000000; freq[2] = rcu_clock_freq_get(CK_APB1)/1000000; freq[3] = rcu_clock_freq_get(CK_APB2)/1000000; #ifdef SUPPORT_ADC_FREQ_GET_API freq[4] = rcu_clock_freq_get(CK_ADC)/1000000; #else freq[4] = freq[3] /((((ADC_SYNCCTL>>16)&0x07)+1)*2); #endif #endif printf("freq: SYS[%d MHz] AHB[%d MHz] APB1[%d MHz] APB2[%d MHz] ADC[%d MHz]\r\n", freq[0], freq[1], freq[2], freq[3], freq[4]); #endif } ``` ## 测试结果 1秒打印一次。    

wadeRen

I can accept likes and shares. I am watching. Where to click

韵湖葱白

wadeRen posted on 2022-1-24 15:17 I can accept likes and shares, I am looking at where to click

Hahaha, I used my own markdown template