Posted on November 21, 2014 at 18:47Hi all,
I´m developing an application in Keil uVision with STM32L052C that is a uC that has 32KB of flash memory.
I add my ST libraries and per example STM32L0xx_hal_uart.c. This library uses some features with DMA but i will not use this.
Looking to compilation size I´ve notized that I could have Flash size problems, so my question is, how is the best way to delete this DMA functions. in all libraries?
Maybe there is an option in project propierties that avoids/removes unused functions from the image created.
Let see the .map file
Symbol Name Value Ov Type Size Object(Section)
...
HAL_DMA_Init 0x08000cf1 Thumb Code
376 stm32l0xx_hal_dma.o(.text)
HAL_DMA_DeInit 0x08000e69 Thumb Code
672 stm32l0xx_hal_dma.o(.text)
HAL_DMA_Start 0x08001129 Thumb Code
78 stm32l0xx_hal_dma.o(.text)
HAL_DMA_Start_IT 0x08001177 Thumb Code
114 stm32l0xx_hal_dma.o(.text)
HAL_DMA_Abort 0x080011e9 Thumb Code
100 stm32l0xx_hal_dma.o(.text)
HAL_DMA_PollForTransfer 0x0800124d Thumb Code
744 stm32l0xx_hal_dma.o(.text)
HAL_DMA_IRQHandler 0x08001535 Thumb Code
796 stm32l0xx_hal_dma.o(.text)
HAL_DMA_GetState 0x08001851 Thumb Code
8 stm32l0xx_hal_dma.o(.text)
HAL_DMA_GetError 0x08001859 Thumb Code
6 stm32l0xx_hal_dma.o(.text)
HAL_UART_Receive_DMA 0x0800341f Thumb Code 160 stm32l0xx_hal_uart.o(.text)
HAL_UART_DMAPause 0x080034bf Thumb Code 114 stm32l0xx_hal_uart.o(.text)
HAL_UART_DMAResume 0x08003531 Thumb Code 126 stm32l0xx_hal_uart.o(.text)
HAL_UART_DMAStop 0x080035af Thumb Code 62 stm32l0xx_hal_uart.o(.text)
and so on...
Image component sizes
Code (inc. data) RO Data RW Data ZI Data Debug Object Name
40 0 0 0 0 5151 app.o
176 4 0 0 0 1077 clock.o
150 0 0 0 0 2019 gpqueue.o
928 60 440 0 0 6808 hal_gpio.o
60 28 192 0 1536 724 startup_stm32l052xx.o
640 40 0 4 0 5696 stm32l0xx_hal.o
376 26 0 0 0 10473 stm32l0xx_hal_cortex.o
2932 22 0 0 0 5012 stm32l0xx_hal_dma.o 788 28 0 0 0 3843 stm32l0xx_hal_gpio.o
228 10 0 0 0 27360 stm32l0xx_hal_msp.o
3072 76 28 25 0 5936 stm32l0xx_hal_rcc.o
4766 102 0 0 0 12765 stm32l0xx_hal_uart.o
652 4 0 0 0 3458 stm32l0xx_hal_uart_ex.o
36 4 0 0 0 169573 stm32l0xx_it.o
352 34 0 29 0 1731 system_stm32l0xx.o
560 22 44 12 208 6075 uart.o
I have to put stm32l0xx_hal_dma.c to avoid compiling error using the others libraries that use DMA functions,
How can I avoid this piece of code?? Compiling switches modifying ST libraries?? Or with some compiler/project settings that dont waste size if I dont use unnused functions??
