![\"\"](\"https:\/\/blog.embeddedexpert.io\/wp-content\/uploads\/2023\/10\/AdobeStock_139809605-300x300.jpeg\")
<\/figure><\/div>\n\n\n\n<\/p>\n\n\n\n
In this guide, we shall take a look at the advanced timer of STM32 and it’s features and how to configure it to generate PWM signal with complementary output and later we shall introduce a dead time.<\/p>\n\n\n\n
<\/p>\n\n\n\n
In this guide, we shall cover the following:<\/p>\n\n\n\n
- Features of advanced timer in STM32.<\/li>
- Complementary output.<\/li>
- Developing the driver.<\/li>
- Results.<\/li><\/ul>\n\n\n\n
<\/p>\n\n\n\n
1. Features of Advanced Timer in STM32:<\/h2>\n\n\n\n
TIM1 timer features include:<\/p>\n\n\n\n
\u2022 16-bit up, down, up\/down auto-reload counter.<\/p>\n\n\n\n
\u2022 16-bit programmable prescaler allowing dividing (also \u201con the fly\u201d) the counter clock frequency either by any factor between 1 and 65536.<\/p>\n\n\n\n
\u2022 Up to 4 independent channels for:<\/p>\n\n\n\n
\u2013 Input Capture<\/p>\n\n\n\n
\u2013 Output Compare<\/p>\n\n\n\n
\u2013 PWM generation (Edge and Center-aligned Mode)<\/p>\n\n\n\n
\u2013 One-pulse mode output<\/p>\n\n\n\n
\u2022 Complementary outputs with programmable dead-time<\/p>\n\n\n\n
\u2022 Synchronization circuit to control the timer with external signals and to interconnect several timers together.<\/p>\n\n\n\n
\u2022 Repetition counter to update the timer registers only after a given number of cycles of the counter.<\/p>\n\n\n\n
\u2022 Break input to put the timer\u2019s output signals in reset state or in a known state.<\/p>\n\n\n\n
\u2022 Interrupt\/DMA generation on the following events:<\/p>\n\n\n\n
\u2013 Update: counter overflow\/underflow, counter initialization (by software or internal\/external trigger)<\/p>\n\n\n\n
\u2013 Trigger event (counter start, stop, initialization or count by internal\/external trigger)<\/p>\n\n\n\n
\u2013 Input capture<\/p>\n\n\n\n
\u2013 Output compare<\/p>\n\n\n\n
\u2013 Break input<\/p>\n\n\n\n
\u2022 Supports incremental (quadrature) encoder and hall-sensor circuitry for positioning purposes<\/p>\n\n\n\n
\u2022 Trigger input for external clock or cycle-by-cycle current management.<\/p>\n\n\n\n
<\/p>\n\n\n\n
![\"\"](\"https:\/\/blog.embeddedexpert.io\/wp-content\/uploads\/2023\/10\/Screenshot-2023-10-19-at-9.21.44-AM-1024x962.png\")
<\/figure>\n\n\n\n<\/p>\n\n\n\n
2. Complementary Output:<\/h2>\n\n\n\n
The complementary output of PWM is a method to generate an inverted signal of the original PWM with dead time. This is typical being used in generating PWM signal for gate drive of MOSFETs, synchronous buck-boost converter etc.<\/p>\n\n\n\n
The typical output of PWM and it’s complementary shown in figure below:<\/p>\n\n\n\n
![\"\"](\"https:\/\/blog.embeddedexpert.io\/wp-content\/uploads\/2023\/10\/ef40092dc300d354d9d61c0c5456c25cfe6cab32-1024x547.png\")
<\/figure>\n\n\n\n<\/p>\n\n\n\n
3. Developing the Driver:<\/h2>\n\n\n\n
<\/p>\n\n\n\n
Before we develop the driver, we need to find which pins are connected to TIM1_CH1 and TIM1_CH1N. We can find these information in the datasheet as following:<\/p>\n\n\n\n
![\"\"](\"https:\/\/blog.embeddedexpert.io\/wp-content\/uploads\/2023\/10\/Screenshot-2023-10-19-at-9.27.52-AM-1024x745.png\")
<\/figure>\n\n\n\n<\/p>\n\n\n\n
We can find that PA7 and PA8 are for CH1N and CH1 respectively. Also, the alternate function is AF01.<\/p>\n\n\n\n
On another hand, we need to find which bus TIM1 is connected to:<\/p>\n\n\n\n
This can be also found in the datasheet:<\/p>\n\n\n\n
![\"\"](\"https:\/\/blog.embeddedexpert.io\/wp-content\/uploads\/2023\/10\/Screenshot-2023-10-19-at-9.34.24-AM-982x1024.png\")
<\/figure>\n\n\n\nHence, TIM1 is connected to APB2.<\/p>\n\n\n\n
<\/p>\n\n\n\n
We start off by including the main stm32 header file:<\/p>\n\n\n\n
![\"\"](\"https:\/\/blog.embeddedexpert.io\/wp-content\/uploads\/2023\/10\/Screenshot-2023-10-19-at-9.43.24-AM-1024x816.png\")
<\/figure>\n\n\n\n![\"\"](\"https:\/\/blog.embeddedexpert.io\/wp-content\/uploads\/2023\/10\/Screenshot-2023-10-19-at-9.44.38-AM-1024x230.png\")
<\/figure>\n\n\n\n![\"\"](\"https:\/\/blog.embeddedexpert.io\/wp-content\/uploads\/2023\/10\/Screenshot-2023-10-19-at-9.46.09-AM-1024x543.png\")
<\/figure>\n\n\n\n![\"\"](\"https:\/\/blog.embeddedexpert.io\/wp-content\/uploads\/2023\/10\/DS1Z_QuickPrint3.png\")
<\/figure>\n\n\n\n