unsv29 发表于 2024-3-19 19:27:50

请教。大多数SPI读写,都是普通IO模拟的CS。那么用NSS管脚配置成普通IO模拟CS可以么?

本帖最后由 unsv29 于 2024-3-19 20:48 编辑

一主一从,STM32F407的SPI2作为主,铁电FRAM为从。
    SPI_InitStructure.SPI_NSS               = SPI_NSS_Soft;



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oFk10l0fjBny+KSRzdyP9yHX6dJH4nVFANKGKZNtnfSzBj4rI4JD8sQZhXBD4IrUJXczb8AjPhHXwcHjE3Ucd1woJt07bgq1rtl/JBzpGYu5Adk4r4ijS8NFc+Y1Zib7sUiede+j2+jHATEy9LviwZyxJz26EpeH3ZbCH5qhMzLrkh//RfgZKFyPnqNcyO9tQClEosmZkITz6BKd/koe6emJjb8o/juQmB+DK5RuIW4JWJJpTY7Q2p+8DDWuRXsMG0GznbgjE7tZ1vk1PPblO10XJuHz7YdQNfT1mDeceyYMrr4tsUjtPidPS7dpyKSselTkDbF25gq06MVXCEXXnc0ZKFyW5JqOT61Lu+wIxqbSZiNQeTFnuVcAGrPY94yHntJKGSVeWdRwxXVQFWrDqJ87ILZxZf+Xno4NjWJv+c0footW07zP63DTvmbsM6dvUr/9fD+Rp3rhj/MmEtXIw+cnu0TQyMOgbUg3IPDrKT91fTYhGZmAmfiCxkP5QO0Fzpt+Og2xq4ZktX6JWx+DfXdPHZV/sl/HJSJArkbfEGFI1N4F7iBbivi8SWjEsIj4jBVJaYHxYiILoCjWjHee8AzDBLM165fTRj1ZRN2GLDK/uODTQ/+1sKIhMuIfTLzRgX24aO4gx4nayHtemMMjGrsXfWoiV5JlbNehku77+Hc5cdiflXk6cgcsc0+GycjuxLYrkmMUuJvOHw+1iwZhZqKrfKkCk3WWKOKH2ASI9weOZnCTNmVqOl/ApWLd4El9kncU66IcArgxq7zbxOH2jIOY0FoUWokepxbQJQ17OZVfytNmPq34/Ae2Ew3lh1HlHSYw2uTQ5Ood+5xmD3sRS4fhqHMx28vlAGD50YK7BIO4oE05oH17nHcVWa8st96nVfUCdmwWYsPuVg4vZjhovT5/uEnXcePaxEdMRJrNyegYvizRXRpIpnbWLmnzNGvCmxtmDD9K3wY7G21CDFnItDqRX4tsH4fGUz5t98Eop//vOfuh+aMSuZpr3RxoDOoKznpvbklWpqBpRuZHisw9gE8RK9I3cvnl5UICz0qvBejx/vlY8QOlf6GptsMM6EKWY/pq25gIOpsWJibq1H2R2xneaUSIzzv8NZZGJBwPQNWGJ7eMwSSkOzUE8+0Igz5kYkhh7G2pgL2BG9B9+ZtBfBZ+4IM1I19paGW+gQkutC5K16Fb/ZOF8zY2YzaPtHdStbuJ0d64plm2ehhtXrMTF3oy3vCCZ/FYvt5ja0tLRJvnYhL8Abvwlv4JaxKKmx22PM6QMNuWexzFTsSMqcdtjx6np2m+qN1suYMS0YPpF78eyHp3G+A33C6eh33Si9fFNYA6DtCzfgpxNjNRy2L487ms7jD5+eFR5tKH1q73Vf4NtMxiYOpipeP2YGOH2+L9i1M+ZudEg3phpPROKP+x2rJdT9wcGxrUX+OfNAditbzpvtKMffduyevxXut9gz6w7kbFyDZ0Lr0dHD+Wr4jJkkOR300tYoZoAzKBt5qz15pdqcAcWSHo5nlhfDAitKtvljckIb0FmK1ycE47TsLrZggXelz7F5LzELh4pOYaxbCgoz4oTEXHswEC5ryoRb6jUHI+Aab3uOrPSkIsIPzwfXircMLTfhuStfeJYtH6Adt7KlY+UzZg32buSG7EHQGfG58oOgCRi/cT6sqlvZ9qTMEq8qMXckT8cXX8/E7WuLgUt/QuT+DUrQsj1xxtwNWOuxfdEaTDvejNxdRxFUJS7WeXAkDOPD7+GSpqwBVg12mWFVH+goz8IXgfm4zWaPDwsQmVzPaacBFk09g+f81hqseM8fQZVm/K8/paIO3Vybejh5/Y7XF67rxFjmrX1TEfdj+zA9qs7YJ8O+IJrl2bzBwXSd04+FJYucPm8HLNvgtSNM9lXnUWNsMFxWFQkXxA1HTHg7SooRpz8oOW6F+XQRLnOwV8sSc7XEm3SjQYZQ3KyN3YXXw+uFdRPfBnnjxeg2NPRwvhomZmaWJDk1PFPBaGNANSgbu9eN0uRojHFLRPo9+crNWqSZUzH9Tzuw+kQxCuy3i1tg3nEAn4Uk4LPQfNxmM6x9m/GvnrJFYFKD9wrT4TotFBtyH4iLn9p5NptxPuI4Aq8VI/hgGQrjozBl8xXcun8d4RFnEHIwDR6BmcjTW4nSXQOTZyTmex3BF96ncbyaDSdNyI7YgRf+no2rTXU4tt4Pv/UtFZNS5z2kxkThWdcohOc1oI6DvfmkCa6rPsKhXR9h49czce7ycqBsKUp3v4Mx01yRnrkMKGNly4HCBUgL/xDT33kDq3fNRUHuUpzzmIjnpk3C+BmTMPaN38MtypcfAmsTLkYdwYqEO2BDa1PGSaxJ7UBzcjxc/TNx6EQGNgacxbkmtmBLW6bHO9prNauyz/kG4jm3YIyfH4yxrp5wS27n2OwCrx4fPCttR9z+dFxtLkZAlLguofc4ef1Opy908GLMQyXGfYz7aYQdTMbXpkJUWg186kVfsPUlpU32qF6NqZHfj1t5fb632NlaLfFVolcm+GJBbBmuWwFrXRF8ApMQFJOOTbuykSc9Y9b2B4njuUew91QOwkJNmOJ/A20c7Ox80fjIg8nKrLWICj4O3/hsBIQmYndRN9BofL5SYtYjk8qdh4E+Jeb+0tKGoGUm7ONPaPtrfICPH8XYB7UPGIVppHA8UnDqcT288VNi1osblTsPAy/+h2bGpH6vlfa/7zwcsf7Qn38dlzF78hq4TJB9JkcghN0uGYp/ww1PXzkYKfifIE5KzH3tJFR/9DEwbYrzJB31zJD2tbFn/YH+EQNDyAAl5iEkn5oeJgyknNIOzpSwnJaTL/4Uri+RypOq1JPU5NXldvnHkHvsUUKS19BjtCM302t/ZAf1iLOfmGRNGW52NOF6WS1qFO8wy44YcJx8Sc6m6rsoqVWvAgUMEzNJcsoCR5ujmwGWnF0nA7/8n06bkJz6dv2LzwLT3sTl993wVl43V2KVJ1WpJ/3Jq8s9gdRyj4sv4EzIVjy1MBPX7t/A8nmBcD9Tp1JCU0tIHkTYUMh09iArycQ7BMnZ3Aau9GevZTrZ+kSePK2aUB2ZTmtFBj75OgmHM/Lhs3ofvK+plL9sOPMGUZLT+gDH95yA/8lC+C31x2fZSgldw8Qs+U3vMas7AO0TA6OMAflrIj3JjGrfE5XIkEkbspI63+kaqU65GlifZDrXuKuSkyMAWknOLq70qCijeBs1mWcRkCmIqDqMsC0VfvX7tDz5TZ5MJzPFq6t9ncZI7rF3OOVxG3SZzh5kJeV8yl9tEiUs+yjTyUjtxWtU2naYxGgQXo4U1VyazSaM316j7EuyuCv5ZI0axUiUsH0cSU5LZjw+OSC+ttX8bRWK7G9xsDaB1MsV+MWc7cgtrdb9UGIWuaL/iYFRy4B8QDKWGdURQlFJGzKi2sx/1Uh1yhNzn2Q69/9Dl3ut/Ka+jOLLa5Mwf/Ml3NdYU0ozCl+rEwFHqlLbtmSYU1fTJPqP0xG3IZDpNJSVVPIpT5ii9GcfZToZeep4aAlVCqZIEqPl5WcxfrI/VpwqQaTnQWwrkc+YlTgdfNqM68fIpi1vlzK1HaL4y5Pk7Ebu1h34KOoC1vofwefbc3BV9XpjXHoxvvPmRvz840DdDyVmBdG0QwyMPgbYgNQ7mVGdxKySNhQYuh2okepkifmxZDrL1xmSrpS11JNRNMHlj5F4c+YuhKm1i3n4dRKBXKqSgVK2rYSprqv8tv84hbgNkUwnjGRgVXwqEvPjyHQy4nTiIedU285xXL1fCs/1MVjw+Ua4/CUVOfLnzCqc2sSsFyPHj75AJWUqxwPwJDnLYPpyDZ7xKcY9PEJ5zC68FlqtmMXTrWwli7RHDDglA9oBSaKBNxiqlJVYTbW0IStrKdmqkeqUz5iN1MA0Mp0GiVkryXmHKz0qyijeRtWxMPza55ZCspSHn5cIlFKV+pKazH91XYlR2R8jucfe4XTEbbBlOgEYyEqq+VQkTEH6s48ynYw1Xl+Usck2te2k4WxgMD4UtOPbkeHjjfE25S9Ov3XwaTNsFCPxVnbfJTnvInVTCBbkiM+VrVWnMO7zHPsPsLCWDRMzSXLagkN/iYHRzYB2QJL85Q2G6sTMkTZkC39yPT/RSHV2yn5xyigxa2Q6I7/SCQBf1pInAWmXUeyswJJZYdhru5/Nxa9NBL2V6WTPkrV1+VKdPInUvuDkxW2wZDp1ZSU5fMoTpk3CkhcjXZlOFn1eX1T1Cm07d5HpHYy56eLK58YEEyab7ouzUw5OJZ8DJ8nZlLwPU3aKz7rbcg/jbV/pJyslfwwTs8BFBehWtir4tEsMjC4GeHKPbCUsRx6RI3molTYU2Wk+tByu/1iEQ6ZF2Ljmrzh3dRNK932EMTPckJ6zBbjlKX5Kv0ba3k8x/b2pWG1ajoLCTTj39ft4bsYHGD/zA4x98224RYfoUs6TtdRKQDYh17QTL3jkoLSjBeaN3njB8xoqrToSqRrf+VKV3LbBr8t1QCP32BecvLgNokynjqyktj/wpD/7INMprMrm9EUNoTrtPChDYHASgmLTsWVHBjIk1T0tzkGU5LTW43BwHFbvS4dv+AWcaVA6Q4lZyQftEQPEQJ8YGN7Shj27MlLwE86eY9mXGsObT0rMfYkl1SUGiIGhY+AJSh4OuhPDEftwxNTbwAxH7E8QEyXm3nYEque8DBgpHvWoGNQH2npSJ1KY6otiUgeqapsVqz7tpuT49RSs7JV72DDiqYdDdb/mYepuQWnRXdRoBZMAuT96Rnk4ee3w6unZ7E85r+2e7PXGT66NvvQblQEDPvQUrHqORz/wqOD1uNv6ANfK6oWfOdXU7ZHP/uLkK39pcEgFlJj1mKHyUczAI5SZd8PlnYMIO5YBH+84BBR0ctWFjBWcbApM7L3IblzcvhsfhiVi3ARfLN1/BK7eV9CsViy6/xCpnj54MfQOumBF0c5t+IHHZVy/2ZM6kSwcarWoRelICtyKpxacx5WmWhx2X4PvrivCLUnRoikzGi5zznIGJAd+60UPLFyxBOaElVj94Sx45fqjbN//g8tEN4SFfwGfVfMRkOQHXN+A5N0LMf7VqVgW5oH8awHA7QBYs5bD4+ulOHpkJTwXzsLaK6oXMxl8K9/38ta7SE44hfETfLHs6FXkS+ukuKpa9/Px+RcxCEm9DK91R7G/RsaLXcGJr9wlQPg2Gx4+6TiaeQWeK8OxtqALvHaM4y5v02i7EzX1rUYVuG1DR8HKYcgWN5tSVS+Uv4TntJXw2xCHoDPFOBQSAJfFOdD8yJlO27p8GCpY9VH5i+HpYx9xcML6VxNfYYwtxis7g489TiM2PQfrvNNwwSI/Us1nHNJq5T/pyuHNoC25ZWHbUg6vfxxGUFo+Ns4LhnvpI1iyD+Pnbwdi4sIdmPQnL7jGKxcHGiZmkuTUUEwFo4QB+epLI6UrQwUnmWIQ0IWLOeVo6qjAZx/vwVFLNwoLKsVkqFpNWhsTDpcVWbiPFkRt2IIJIVWo7UmdyM57z0pE1WGBeC22TTyitRwh4XvwPC8xy/DXeb7x2CpdwqtNXuPgsuRjtJUsRnPEJIwLvM2dofN8F14aUXHEwPMUvfI3++Hd0+KLqB1XojF2VZnjtSeZP4LzHJu8ePLUu3j1pOsceyR63Gi+glXB1/R1t7k+iglBvrpYoywl81Pej/WVv6qEi8DynYGYGGNLxRacMBdC/To384nX9t192+Cy/iZYr2pONmFcoPjeraGClQyn1iZf+Yvh6UsfUcdA2w5b7dyNjI3++OiseLHYELsHMxOk84MZkOFU8sm+5J9vDCe/LTUioHJvOGaeENuzVl1B7OUuWC4WwvyA1W3C0b3puKS6jjVMzFITtCpbyzWVjHAG5CegodKVroKTUjHITof6VSL2hSpB3EswY+KyOCQ/LEGYVwQ+CK1Cu6E6kd06Gw6wbdoWfFUrL1MOEo7E3IXsmFTEV6ThpbnqGbMSf9vxGY+v0lWyGFv/tOYAABB3SURBVLjkhvzTfwVKFiLnq9cwO4U/U+T5rpeYtapaFmx6awNW2V5zajqHn005gnKBCqU/QpGKd6GME09tOwA49Rj3WUfTEHT0AjwjcnBNupXeVp4Pj2+OIKrsNnYHn0R0WRus1TcR6bsNLnNO4kBqOSp0sjq3bdWgr1SWUvrp6MdGyl8sMfP7jbIXiXvyhGNvm8uHkYKVEqfWJl/5iyHoSx9R49e2k4RKdMG8yhdzssT3hhviQzDG1yboocTp4NNmWZ83flu242x/ecpftu+Atqsp+Ca+QXMRe/R8Cb737ha85xGl+6HE7OCRtkYJA+wE7LXSFROLyDmNBaFFsN85VSkG2WnpTWJOvAD3dZHYknEJ4RExmBpaha5GA3Uiu3G2oa9E9LO/pSAy4RJCv9yMcbFt6CjOgNfJelibzmgTsxr/DY9+q3QJM+fD72PBmlmo+Sc/E93j+c7c4iVRjapWE1ZOWI8Ntrt+LZl4cUIULrEEqfbHwCb7Sh1PPfUueb22zGhM8bsjDKJ1B3bgjQO22Wc3CnaFYZYpHV5H79hn8B2lxzFhVaHhjJlh4bWtGPTlylIqP4V+3KPyF0vM/H7D2lf/021bw1snElfqKFipcGptxuLTKZuwRaURzbD0tY/I8WvbOY6rVuBBahR+Nj8BexJS8cWCNfiZn5SYVTi1iVmfN7225Hj4yl8V+FY4PVpxaGMM9gozZ+VRKbnl+M+P/BF1ulD3Q4lZyRntjQIGtCeg5BQnQfAUnNTKRnZKepWYM2GK2Y9pay7gYGospobeQp6BOpHdtrDRsxKROGNuRGLoYayNuYAd0XvwnUl7EXzmjl1dSI2/pcC9XypdGqUu3cSs9p0lDX5i1ip6VWPHzM1YWiUx0pSC/3z3hHCxpPZHqMGJJStXx1PbjvhSqbpe7U5vuHx1HuHxmQg3xeOrE7KZTksepk3YgXDZINubxKzXtmLQF5Syzgq3ndV+OvqxkfKXOGMOmL4BS2wLDxgPDc32iwiJUeGPXttqPtjjm/M6ClZqnFqbfOUvdkf3XmLv+4gcN9vWtiPyxr5r+rYcSbk1KAkLxuR48dayGqeDT5tl/vnGcBq1ZTsaaMfu+Vvhfos9ouhAzsY1eCa0XuS96SLe+zQZ5ZxrWLqV7WCQtpyIAe0JKDmvGsy5Ck4cxSA7db1KzFk4VHQKY91SUJgRJyTmC3rqRHbDjg1DtSgAjlvZ0jHqGbMGfzdyN05/bJUulpQ1Sl1JtvvNDtxsi6dKxU/MfEWv6thwTIkUs19zaiQmBd1Fl8YfqU1VLFmpNp71yN11FEFV4rPdB0fCMD68AZbyLHwRmI/bbNB8WIDI5Ea0JIXhv7yrxNuOjVXIrbD9GEI3io6fxq74OLzre8N+8WMtP4k3VhXAYq3HTcm+kg2+j6xJ+aBvU8qycvzk9WM9jnn9RnYdYYfGa5vHBzuAq2DFwcmzyVP+Ynj08OvdVbED1+ONPSmuykfQiRp0WBsQtHI/9rFrLw5OJZ/6yl8MJ88nTo5FbewuvB5eL/Sbb4O88WK0eFFgyT4Il4/ToHoqJbhjmJhJklMectoePQzwFJN4Sld8BSetYpCDmXuF6XCdFooNuQ/EAVyjIKWjzFTPVydyWJZtadSiGpEdsQMv/D0bV5vqcGy9H37rWyomlc57SI2JwrOuUQjPE2d4PPzNe6bB9atpOLRzGjaucsW5nIUojZiMMVPfRfqFRWDJV/hccUNa2AeY/vbrWL1zFgousfKFOPf33+O5qa9h/PTXMPYPr8ItifeMWcf3Vr6qE19Vqwkn952CX0w6Nu3ORWl3b5W7GH/8eGrb4deDtR6HAmOwYmcKvPfmIk9YsNONsrOJ+GhzDr69fxN/n7cd7uclyceOcnitj4NffAFybbffZWFkm9q2WSlfwUobN14/1uGYZQxNv+GlEV7bOnwwqBwFKy1Onk09PDr4dfqIkk6ddhjMb7MwZ0UcfMIS4HNG7zyQ+Jx7BHtP5SAs1IQp/jfQxuVNvy0lJtZ4LaKCj8M3PhsBoYnYXSRe0LVdTsCrqy5BJfolHG6YmFmNTpLk1PBMBc7MwPBWDOo5Mjr4W0uAlqtP7oN/9gzlidTQ8eeJ2B5ORkaKn4TzSfQaSsxPgkWyQQwMBANPUEloIOAZ2hzJ2A0de8wvhyMfwxFTb+kdjtifICZKzL3tCFSPGCAGNAw8fPgQS5cu1ZRTATFADDw+A5SYH587OpIYGP4MdLTgRnkDmniPE3uUIezZvZqaGvzkJz8B+iQn2rPdXtWw4e+sBe7nofjaZTQ9LIO1rRzo66flKioKM1FZVw48kolP9AaInkRoX6U2bf4YtcmTxeS1w6unZ5d3vF5dVt4bnNzj+ylr2Refeo2zn5i4fvILrS0WNCm+6kb17QZVmViBErOCKNohBoY7A32QE63JR0hUIcxpKZi13IxMhbqQTYawf3Ki3/s8GU//6If45OskHM7Ih8/qffC+ZlutrObyEW4mMynUAwhLyIb/piBMj67nSJnmIU+STN115Bw8PPbDr1ht04FfkBNd4grz4ZlYPXUivM4vQlnYJLi89ibCgqfBx/0tBBxdCFxxQ3Loexj/0jgsC/oI+cLCtcWwpk2Hx5dTcfTATHjOn4i12dfUwPXlRO/xJUJ5Mp9Qy7MqFoQ5/NGrx5PF5LXDq6d1SCzRHH9HX9ZSPMKGkyMH+mUW7ulKanJkLdWgDGQueT4Zy1pKOHMbdGU6wZG2TeTI5epJxqrh60qCSquoJ8+IwjGbFGhnJTb8bRc84s9jqUcCzMqMDcPETJKcGuqpgBgYcgbkr3QYyYl2XEvB2gR2xrcjbmUQVpbJkptMhrA/cqL/1zMPz3z/e3g5UhxZms0mjN8u/gA8jyiG/f8syJJmCS0oKK7GBY6UaX3VSfxuoVivOcmEV/xtSk2SVRn+Or+Pnqyc6NZ0cUW9ygGtVGQlcnQkQrVyopL2MucVLqEZmT/CPqceTya0v3KiPJzy14D6Kgda2smT1KxEWT/kQNn1JM/3ZiNZSxmffH/4UpvXOHK5/Nf5VJ1D2uW3Ja6iFqV6xYr3D23DT31qhHf4HxwKxC+C6hUGDROzVJMERhSU0Q4xMLQMyBOzoZyoBNNSVYAVq07ivCgxLfzgRv6X6/DrJNXPM/XmHWyVnOhbXnn48Y9+iPGT/bHiVAkiPQ9iW4nsAkBFlT0xd97B+qALjh/WULXt8LENmf478Odk21SDGVTKKLYlf/5k5URPFKpQi7taqcgb2KAjEaontcl/F1fpj9AaJzHzZEK57XDlM7kugXe8PLnYJTmFw5U4HTFyyIGyajyetnJkZHmIdNs28Ekra6nEybfJl9rUYtcXwOkTfkX/7oR5yTq8kSaef10l0fjBny/a339nduPOFeO/T96An38cqPuhxMyLAJURA0PEABsQey0n+rAS0REnsXJ7Bi7aXi1WyRDa3VAMHlKpKkGo5RLf9srDT555Gp7rY7Dg841w+UsqcuwXAHbL9g2G/QXXGITHHsdrHumGiflX0w7Dz8MPkw/UCj+eYDeixn8n/MnKiVpK7U3JN9S+Tw0thbueRKiO1CY3Mav9YY2qeJfjkMuEsnKepCcrV9eT25Bvq49XJLI+yoEyu1qeyuChI78px8G2dduWKmp94shaqvjk2+RLbWqx9yMxy7lTnFvtOOi2Bq7Z0gVsZSz+zTVd8ayZzZjHzNmO3NJq/qf4Jigxq3sP7RMDQ8iAY6aiAqEZzLvRIU2KG09E4o/7RZ0ntQyh3Ypi8JBKVTbVcolve13C//ju9/ChmS2YakeGjzfGRykentrNsw2GXbyV3YVrZXcdkpCqtm0+NhQewbhvripmE2r8LddDnqycqG5iVktF3kSwjkSontQmL+Gq/REIU/FuI1Eti6nXjrqe7Xj1X97xikTWRzlQZl/dR6aG3oBfP+VAmV2uTxxZSzWffH/4UptV/ZADZRj5balvZXcjw2MdxiZIv5KWuxdPLypQaKob3cq2PW+nxKzuzbRPDAwhA7akpVovopllNcYGw2VVkXDCNxwx4W2WMDkyhHZXVMlRKFclCLVcIkvMP/zu9zA3XbwCaEwwYbJJUr6yG3ZsOBIzK2vByeQiUflI1bbdR+tdrJ0XhgibwqcGfzdyvT97snKix3McgGVbat/Zj49U8SRCoS+1qUnMGn+kBlW8s9L+yInK3JBt8nE2p+7BK35VwkVTX+VAmXEeT9cj/PB8cK2oi265Cc9d+Y67JTJE8sRmb5vru3jxp5G15PCpZ5MnUXo9US2X+/gzZjl+ptQlf8ZsSQ/HM8uLYYEVJdv8MVn+M5SA4eIv2/N2SsyyjkObxMDQMsCTYeTJiQLWuiL4BCYhiMlX7spGXruOfKXk0OPIiU74KgU/euZpBAYnISg2HVt2ZCDD9qNLGqIe4WZKNH45J16QPNwRGI4PdooJQNk2q3cAL7idwIX6blQeMmGSf4kgMaqVewSaD3vA9R+Lcci0CBvXLMC5q5tRum8WxsxwQ3ruFuCWp/gp/QZpez/F9PemYrVpOQoKWflmnPv6fTw3wxXjZ7pi7Jtvwy2xTIOc/arX+YjjCLxWjOCDZSiMj8KUzVdwy6qVCGUHc6U2NfKsOvHg1Ou3nCjHIz5OvtSklnedfqjHU0cNTJ6RmO91BF94n8bxat77e/y29Xxn+NWyllqcejZ5kqCN/Bj3Sg6UodFpS1pF/coEXyyILcN1wfUWmHccwGchCfgsNB+3VfExmjHb1hpQYlaRRrvEwMhk4MnLJdrfYx4UQp48/kGBrdvISPGHcOqGcIC+MEzMUpuUmAeIfDJLDIx0BnQT8xOUJxx0jkYydh5Zw9Gf4YiJxx2vbBCw95SY2fN2Ssy84FAZMUAMQDcxDzg3Haiqbda+b/zYqlQcwEOhZqaG8dj+DJKiVU9qXD3iHyScal7V+0OGk9+PjRKzba0BJWZ1EGmfGCAGBAb6n5h7r2Qmp7wpMxouc86qFhDZVKnaOWpiV9DMU97SUaq6fjOjF2pmXSgM3wqXT8yIiE3F8uUmbC5gr8C0IDtkK55amIlr929g+bxAuJ+pg1XTfityIoLx1OJM3LZ2ojTlMNz8SnDL/vjV5g+zKeMp4SJCQ0wY456GOK5SVS9UtgQyee1fxaldap9sKl9xSKuVhFKEn1LMhodPOo5mXoHnynCsLRCkOGRh6kF9q7fKW4wPDXeyZmybesphrQX4fLY/Xv1LEF6dZ4LPFR2ceXw/eQphp7dvhct8M3YfS8eG0Czk6r4iqNdHRND8fmy0+MvxE5wuvQNgY4f+EgPEgLMw0NLSgq1bt/bLXfsKbDbY30zEePd88fUozspkoaHWcoSE78Hz6sRsV3vqwkWOmpjwshjHplbRqwq1+4J6pWbWkmrCS77iAjamUPaypFAmrgS+jZrMswjIbHbwo2rfknkWcz7ZgVVXu4H6bOwUXjuTqtv9EfflPLFEXZlfjgsHwuGyIgv30YKoDVswIaT3KlvMKq99nk+dMiU2mzO21cHsRbnmZBPGBeqrs8lXRotqYuUo4aiB6SpvsUZV3NlwyP9q26lER0sOQuL1X+GDjGclx8wyXyGsUrZyXaOOJgfELtN0+gj0+nEPq7Jt5v8/JV6Xb0OLPIUAAAAASUVORK5CYII=

请教 铁电的CS脚连接到STM32F407的PI0也就是SPI2_NSS脚,把SPI2_NSS脚配成普通I/O,可以么?

void SPI2_Master_Init(void)
{
    GPIO_InitTypeDefGPIO_InitStructure;
    SPI_InitTypeDef   SPI_InitStructure;

    RCC_APB1PeriphClockCmd(RCC_APB1Periph_SPI2,ENABLE);
    RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOI, ENABLE);
      
    GPIO_InitStructure.GPIO_Pin   = GPIO_Pin_1 | GPIO_Pin_2 | GPIO_Pin_3;
    GPIO_InitStructure.GPIO_Mode= GPIO_Mode_AF;
    GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;
    GPIO_InitStructure.GPIO_PuPd= GPIO_PuPd_UP;
    GPIO_Init(GPIOI, &GPIO_InitStructure);

    GPIO_InitStructure.GPIO_Pin   = GPIO_Pin_0;
    GPIO_InitStructure.GPIO_Mode= GPIO_Mode_OUT;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;
    GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
    GPIO_InitStructure.GPIO_PuPd= GPIO_PuPd_UP;
    GPIO_Init(GPIOI, &GPIO_InitStructure);

    GPIO_ResetBits(GPIOI, GPIO_Pin_0);

    GPIO_PinAFConfig(GPIOI, GPIO_PinSource1, GPIO_AF_SPI2);
    GPIO_PinAFConfig(GPIOI, GPIO_PinSource2, GPIO_AF_SPI2);
    GPIO_PinAFConfig(GPIOI, GPIO_PinSource3, GPIO_AF_SPI2);

//         RCC_APB1PeriphResetCmd(RCC_APB1Periph_SPI2, ENABLE);
//         RCC_APB1PeriphResetCmd(RCC_APB1Periph_SPI2, DISABLE);

    SPI_InitStructure.SPI_Direction         = SPI_Direction_2Lines_FullDuplex;
    SPI_InitStructure.SPI_Mode            = SPI_Mode_Master;
    SPI_InitStructure.SPI_DataSize          = SPI_DataSize_8b;
    SPI_InitStructure.SPI_CPOL            = SPI_CPOL_High;
    SPI_InitStructure.SPI_CPHA            = SPI_CPHA_2Edge;
    SPI_InitStructure.SPI_NSS               = SPI_NSS_Soft;
    SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_16;
    SPI_InitStructure.SPI_FirstBit          = SPI_FirstBit_MSB;
    SPI_InitStructure.SPI_CRCPolynomial   = 7;
    SPI_Init(SPI2, &SPI_InitStructure);

    SPI_Cmd(SPI2, ENABLE);
}



eric2013 发表于 2024-3-20 09:16:04

可以的,没问题。

这个NSS管脚,既可以配置成硬件片选方式,也可以配置成普通GPIO来软件控制。

unsv29 发表于 2024-3-21 19:47:32

eric2013 发表于 2024-3-20 09:16
可以的,没问题。

这个NSS管脚,既可以配置成硬件片选方式,也可以配置成普通GPIO来软件控制。

谢谢。这样我心里就有普了。
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查看完整版本: 请教。大多数SPI读写,都是普通IO模拟的CS。那么用NSS管脚配置成普通IO模拟CS可以么?