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view Documentations/OSTC4_CPU2_F411_Configuration.txt @ 224:ceecabfddb57 div-fixes-3
Bugfix, deco: fix 2 (small) problems with calculated ceiling
This fixes 1 trivial, and 1 not really trivial bug in the calculation
of the ceiling. When simulating a bounce dive to 80m, things become
clear (tried this on a CCR dive, fixed setpoint 1.2bar, about 15 minutes
of bottom time). Closely watch the behavior of the ceiling data. At some
point during the ascent, the ceiling begins to decrease in 10cm steps.
Then suddenly (while still ascending), the ceiling increases again with 1m,
does not change for some time, and then suddenly steps 1.1m less deep.
While not very relevant to real deco diving, it is simply wrong.
The reason for this is subtle. The algorithm used to find the ceiling
is a sort of linear search, stepping down a meter, overshoot the depth, and
search back in 10cm steps. It seems some numerical instability. Fixing
this, was a bit more computational intensive search by stepping up down in
equal steps of 10cm. But, I'm pretty sure that things can be speeded up here, as a
ceiling does not change fast, so it should be not that difficult to limit
the search space, or use a binary search algorithm instead.
The trivial second problem fixed, is that the ceiling ends at the surface
and not at 1m depth. This small issue became visible after changing the step
down size above.
Signed-off-by: Jan Mulder <jlmulder@xs4all.nl>
| author | Jan Mulder <jlmulder@xs4all.nl> |
|---|---|
| date | Sun, 31 Mar 2019 19:35:51 +0200 |
| parents | 7d1b61176708 |
| children |
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Configuration OSTC4 CPU2 F411 STM32CubeMX 4.9.0 Date 07/30/2015 MCU STM32F411RETx PERIPHERALS MODES FUNCTIONS PINS ADC1 IN8 ADC1_IN8 PB0 I2C1 I2C I2C1_SCL PB8 I2C1 I2C I2C1_SDA PB9 RCC Crystal/Ceramic Resonator RCC_OSC32_IN PC14-OSC32_IN RCC Crystal/Ceramic Resonator RCC_OSC32_OUT PC15-OSC32_OUT RTC Internal Alarm RTC_VS_RTC_Alarm_A_Intern VP_RTC_VS_RTC_Alarm_A_Intern SPI1 Full-Duplex Slave SPI1_MISO PA6 SPI1 Full-Duplex Slave SPI1_MOSI PA7 SPI1 Full-Duplex Slave SPI1_SCK PA5 SPI1 Hardware SPI1_NSS PA4 SPI3 Full-Duplex Master SPI3_MISO PC11 SPI3 Full-Duplex Master SPI3_MOSI PC12 SPI3 Full-Duplex Master SPI3_SCK PC10 SYS SWD and Asynchronous Trace SYS_JTMS-SWDIO PA13 SYS SWD and Asynchronous Trace SYS_JTCK-SWCLK PA14 SYS SWD and Asynchronous Trace SYS_JTDO-SWO PB3 Pin Nb PINs FUNCTIONs LABELs 3 PC14-OSC32_IN RCC_OSC32_IN 4 PC15-OSC32_OUT RCC_OSC32_OUT 8 PC0 GPIO_Output Power Main CPU GPIO_Output 9 PC1 GPIO_Output Charger GPIO_Output 10 PC2 GPIO_Input Charger GPIO_Input 11 PC3 GPIO_Output LED GPIO_Output 14 PA0-WKUP GPIO_EXTI0 Wakeup Button Input GPIO_EXT0 15 PA1 GPIO_EXTI1 Wireless Input GPIO_EXT1 16 PA2 GPIO_EXTI2 Wireless Input GPIO_EXT2 17 PA3 GPIO_EXTI3 Debug Test Button GPIO_EXT3 20 PA4 SPI1_NSS 21 PA5 SPI1_SCK 22 PA6 SPI1_MISO 23 PA7 SPI1_MOSI 26 PB0 ADC1_IN8 Ambient Light ADC1_IN8 33 PB12 GPIO_Output Wireless Power GPIO_Output can be changed 40 PC9 GPIO_Output Button Control NSS 46 PA13 SYS_JTMS-SWDIO 49 PA14 SYS_JTCK-SWCLK 51 PC10 SPI3_SCK Button Control SPI3_SCK 52 PC11 SPI3_MISO Button Control SPI3_MISO 53 PC12 SPI3_MOSI Button Control SPI3_MOSI 55 PB3 SYS_JTDO-SWO 61 PB8 I2C1_SCL 62 PB9 I2C1_SDA SOFTWARE PROJECT Project Settings : Project Name : OSTC4 CPU2 F411 Project Folder : C:\workspaces\ARM_M4\OSTC4\OSTC4smallCPU Toolchain / IDE : MDK-ARM 4.73 Firmware Package Name and Version : STM32Cube FW_F4 V1.7.0 Code Generation Settings : STM32Cube Firmware Library Package : Copy all used libraries into the project folder Generate peripheral initialization as a pair of '.c/.h' files per IP : No Backup previously generated files when re-generating : No Delete previously generated files when not re-generated : Yes Set all free pins as analog (to optimize the power consumption) : Yes Toolchains Settings : Compiler Optimizations : Balanced Size/Speed