AnsweredAssumed Answered

Vybrid GPIO setting speed

Question asked by MARIO TURQUETI on Oct 14, 2016
Latest reply on Oct 19, 2016 by Yuri Muhin

I'm using vybrid MVF61NS151CMK50 with MQX 4.2

Setting a GPIO direct in the vybrid registers:

   uint32_t *GPIO4PSOR =(uint32_t*)0x400FF104;   //Port Set   Output Reg (GPIO4_PSOR)

   uint32_t *GPIO4PCOR =(uint32_t*)0x400FF108;   //Port Clear Output Reg (GPIO4_PCOR)

     *GPIO4PCOR = 0x00000005;

     *GPIO4PSOR = 0x00000005;

I check the pin level and takes something like 100ns to goes down and up again…

I set the pin config to 200MHz:

   temp1 = 0x000038B2;      //original:0x00000062

   *IOMUXCPTE23 =temp1; //Soft MUX Pad Control Reg 128 (IOMUXC_PTE23)

   *IOMUXCPTE24 =temp1;

   *IOMUXCPTE25 =temp1;

Why it takes so long? Is it 100ns the maximum GPIOs speed (1->0->1)? @Can I change pin voltage levels faster?


Bruno Castelucci
Bruno Castelucci

Robson Tenedini